From what I can gather, this is what’s called a “conversion word.” Where the word itself (its “form”) doesn’t change, but the word’s part of speech does. Before the mid 1500s, pretty (also spelled pretie, prety, and prettie) was only an adjective. By end of the century, it started to be used as an adverb (the usage you’re describing) as well. Per the OED, one use of pretty as an adjective meant “considerable, sizable. A pretty many” (meaning a good many, or a lot). It was used this way from the 1400s on. In the mid to late 1500s it shifted. There’s a use from 1577: “Berlady tis prety good meate.” And then in 1598 a usage that’s definitely connected to the one you’re talking about: “Boccace is prettie hard, yet understood: Petrarche harder but explaned.” It was likely “converted” verbally and then the written word caught up. I know that’s not the most complete answer, but hopefully it’s satisfying enough? I’m just a word nerd who recently discovered most public library cards provide online access to the Oxford English Dictionary, so if any experts see this and know I’ve gotten something wrong, feel free to correct me! :) Edited for grammar and clarity Answer from toukacottontails on reddit.com
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Reddit
reddit.com › r/words › how did "pretty" come to mean "sort of" or "somewhat?"
r/words on Reddit: How did "pretty" come to mean "sort of" or "somewhat?"
October 28, 2024 -

How was your day?

Pretty good.

How or why did this happen to this word which originally meant beautiful, pleasing to the eye, etc?

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Reddit
reddit.com › r/english › why do we use "pretty" like "very"?
Why do we use "pretty" like "very"? : r/ENGLISH
October 9, 2025 - Very, somewhat or a bit? ChatGPT said: In England (and generally in British English), when “pretty” is used as an adverb — for example: ... However, if you use “pretty” as an adjective (not an adverb), it means attractive or pleasing to look at — e.g.
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Cambridge Dictionary
dictionary.cambridge.org › us › grammar › british-grammar › pretty
Pretty - English Grammar Today - Cambridge Dictionary
We can use pretty as an adverb, before an adjective or another adverb, meaning ‘quite, but not extremely’. It is informal:
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Reddit
reddit.com › r/etymology › 'pretty' as in synonymous with 'fairly'
r/etymology on Reddit: 'Pretty' as in synonymous with 'fairly'
May 17, 2018 -

Please can you explain the origin of 'pretty' being synonymous with 'fairly', as in "that was pretty good".

I am British, but this colloquialism is used quite commonly here too. I don't understand it though, as it's literal definition seems so far detached from how it is meant.

Find elsewhere
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Merriam-Webster
merriam-webster.com › dictionary › pretty
PRETTY Definition & Meaning - Merriam-Webster
Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback. Adjective Behind the pastry case out front, where pistachio pain suisse and chocolate-chunk cookies sit pretty, is a quiet, serious kitchen. —Sarah Blaskovich, Dallas Morning News, 9 Mar. 2026 Shaved vegetables almost look too pretty to eat. —Kimberly Holland, Southern Living, 9 Mar. 2026 · Adverb Accessibility The property, set on a mountain, is pretty difficult to navigate by foot.
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WordType
wordtype.org › of › pretty
What type of word is 'pretty'? Pretty can be an adverb, a noun, a verb or an adjective - Word Type
pretty can be used as a adjective in the sense of "Cunning; clever, skilful." or "Pleasant in sight or other senses; attractive, especially of women or children." or "Of objects or things: nice-looking, appealing." or "Fine-looking; only superficially attractive; initially appealing but having ...
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Quora
quora.com › Is-pretty-a-verb-or-an-adjective
Is 'pretty' a verb or an adjective? - Quora
On the contrary, the word “pretty” functions not only as an adjective, but also as an adverb (adverb of degree). As it is, whereas “pretty,” as an adjective, modifies a noun, “pretty,” as an adverb, modifies an adjective.
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Quora
quora.com › In-the-sentence-“She-is-looking-pretty”-what-is-“pretty”-an-adverb-or-an-adjective
In the sentence “She is looking pretty”, what is “pretty”, an adverb or an adjective? - Quora
Answer (1 of 12): Lotta misinformation here. Let me explain. Some verbs are called “linking” verbs, such as “is.”. They connect the subject and whatever comes after the verb: Mary is the president. (Mary=president). This is quite different from transitive verbs, which “transfer” ...
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Reddit
reddit.com › r/grammar › does "pretty" strengthens or weakens an adjective? what about "fairly"?
r/grammar on Reddit: Does "pretty" strengthens or weakens an adjective? What about "fairly"?
December 25, 2019 -

• In the sentences below, for example, does "pretty" strengthens or weakens the meaning of the adjective?

  1. Your food is pretty good!

  2. When I asked her if she was doing good, she answered, "I'm pretty good!"

  3. I had a pretty good day; what about you?

  4. My brother is pretty cute.

• What about "fairly"? In the examples below, does it strengthens or weakens the meaning of the adjective?

  1. I can speak Japanese fairly well.

  2. This food is fairly good.

  3. I had a fairly good day, thanks; what about you?

Thank you for your help!

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Speak Confident English
speakconfidentenglish.com › home › #211: pretty much, pretty sure meaning — use pretty as an adverb
Pretty Much, Pretty Sure Meaning — Use Pretty as an Adverb
July 14, 2021 - In this Confident English lesson, you’ll learn 4 ways to accurately use ‘pretty’ as an adverb in English. Plus, you’ll get tips to know which meaning is used when you hear someone else say it.
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Reddit
reddit.com › r/englishlearning › meaning of "pretty" in these idioms?
r/EnglishLearning on Reddit: meaning of "pretty" in these idioms?
February 1, 2020 -

Hi,

I have come across some idioms such as "be in a pretty pickle" and "cost sb a pretty penny"

In what sense is "pretty" used in these sentences?

It feels like an adjective here, but as an adjective, "pretty" usually means beautiful and that meaning doesn't seem to quite fit into these idioms.

as an adverb, it can mean large. But in these phrases it is not used as an adverb. it comes before the noun, isn't it?

it feels like the first idiom should be like: "be in a pretty **bad** pickle", Obviously it isn't but why?

can somebody please explain the reason?

thank you

Top answer
1 of 5
6

As FumbleFingers says, this is a pretty old use, going back to Early Modern English:

Pretty (pri•ti) adv. Forms: see prec. [The adj. in adverbial use.]
 1. To a considerable extent, considerably; in a fair or moderate degree, fairly, moderately, tolerably; [...]
1598 FLORIO Dict. Ep. Ded. 3 Boccace is prettie hard, yet understood: Petrarche harder but explained. —OED 1

(I offer this OED 1 citation rather than the earlier one reproduced by FumbleFingers because I am not convinced that the use in the earlier citation is adverbial.)

Pretty has a complicated history, as you may see from the OED 1 entry which immediately precedes the link above: from cunning, artful to clever, skilful to ‘a general epithet of admiration or appreciation... fine, pleasing, proper’, and so forth, leading to the main modern sense ‘having beauty without majesty or stateliness’; but the origin of this adverbial use clearly lies in OED 1 sense 5 for the adjective:

 5. Considerable in number, quantity, or extent, as in a pretty deal, while, way, etc.; also a pretty many = a good many; ...

OED 1 gives citations for this use dating from c. 1485 down to 1861, but marks it as ‘Now arch. or dial.

I am surprised you did not find this in any dictionary; I found it in the first three online dictionaries I checked, Collins, Oxford, and Merriam-Webster. All three post definitions for the adverb after those for the adjective.

2 of 5
4

Perhaps it has to do with French influence after the Norman conquest from the expression "près de" (near) since it means "close to" or "right up to"? I have NO evidence of this. Does anyone? This just came to mind.

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Vocabulary.com
vocabulary.com › dictionary › pretty
Pretty - Definition, Meaning & Synonyms | Vocabulary.com
If you say, “That’s a pretty mess you got me into!” that means it’s a bad mess. Pretty has an adverb form that means something is present to a moderate degree, another way to say fairly.