Tra từ fairly - Từ điển Oxford Advanced Learner 8th

fair·ly BrE [ˈfeəli] NAmE [ˈferli] adverb
1. (before adjectives and adverbs)to some extent but not very
•a fairly easy book
•a fairly typical reaction
• I know him fairly well, but I wouldn't say we were really close friends.
• I go jogging fairly regularly.
•We'll have to leave fairly soon (= before very long).
•I'm fairly certain I can do the job.
•The report was fairly incomprehensible.
•I think you'll find it fairly difficult (= you do not want to say that it is very difficult).
2. in a fair and reasonable way; honestly
• He has always treated me very fairly.
• Her attitude could fairly be described as hostile.
3. (old-fashioned)used to emphasize sth that you are saying
•The time fairly raced by.
Idiom: ↑fairly and squarely

Thesaurus:
fairly [fairly] adv.
•The plants are fairly easy to grow.
reasonably • |especially BrE rather • • quite • |AmE informal, BrE pretty •
fairly/reasonably/rather/quite/pretty good/successful/large/easy/pleased/confident
fairly/rather/quite/pretty bad/big/heavy/new/difficult/expensive
fairly/reasonably/pretty certain/accurate/happy/safe/sure
Fairly or reasonably? Fairly is more positive than reasonably, which often suggests that sth is of an acceptable standard, but not the best.

Which Word?:
quite / fairly / rather / pretty
Look at these examples:
▪ The exam was fairly difficult.
▪ The exam was quite difficult.
▪ The exam was rather difficult.
Quite is a little stronger than fairly, and rather is a little stronger than quite. Rather is not very common in NAmE; pretty has the same meaning and this is used in informal BrE too: ▪ The exam was pretty difficult.
In BrE quite has two meanings: ▪ I feel quite tired today (= fairly tired). With adjectives that describe an extreme state (‘non-gradable’ adjectives) it means ‘completely’ or ‘absolutely’: ▪ I feel quite exhausted. With some adjectives, both meanings are possible. The speaker’s stress and intonation will show you which is meant: ▪ Your essay is ˈquite good (= fairly good — it could be better); ▪ Your essay is quite ˈgood (= very good, especially when this is unexpected).
In NAmE quite usually means something like ‘very’, not ‘fairly’ or ‘rather’. Pretty is used instead for this sense.

Example Bank:
•He's always treated me very fairly.
•It's fairly clear that there is still room for improvement.
•That's a fairly typical reaction.
•The plants are fairly easy to grow.
•The software is fairly easy to use.