Tra từ reasonable - Từ điển Oxford Advanced Learner 8th

rea·son·able BrE [ˈriːznəbl] NAmE [ˈriːznəbl] adjective
1. ~ (to do sth) fair, practical and sensible
•It is reasonable to assume that he knew beforehand that this would happen.
•Be reasonable! We can't work late every night.
•Any reasonable person would have done exactly as you did.
•The prosecution has to prove beyond reasonable doubt that he is guilty of murder.
•We have reasonable grounds for believing that you are responsible.
•You must take all reasonable steps to ensure that the information that you provide is correct.
•It seems a perfectly reasonable request to make.
Opp: ↑unreasonable
2. acceptable and appropriate in a particular situation
• He made us a reasonable offer for the car.
• You must submit your claim within a reasonable time.
3. (of prices)not too expensive
Syn: ↑fair
• We sell good quality food at reasonable prices.
4. usually before noun fairly good, but not very good
Syn: ↑average
•a reasonable standard of living
• The hotel was reasonable, I suppose (= but not excellent).
• There's a reasonable chance that he'll come.
Derived Word: ↑reasonableness

Word Origin:
Middle English: from Old French raisonable, suggested by Latin rationabilis ‘rational’, from ratio, from the verb reri ‘consider’.

Thesaurus:
reasonable [reasonable reasonableness] adj.
1.
•It seems a perfectly reasonable request to make.
fair • • just • • plausible • • equal • • even-handed • |formal equitable •
Opp: unreasonable
be reasonable/fair/just/plausible/equitable that…
be reasonable/fair/just to do sth
a/an reasonable/fair/just/equal/equitable division/distribution/share of sth
2.
•The furniture is in reasonable condition.
fair • • acceptable • • satisfactory • • adequate • • decent • |especially spoken all right • • not bad • |informal, especially spoken OK •
be reasonable/fair/acceptable/satisfactory/all right/OK to do sth
be reasonable/fair/acceptable/satisfactory/all right/OK that…
a/an reasonable/fair/acceptable/satisfactory solution
a/an reasonable/acceptable/satisfactory/adequate/decent level/standard of sth
3.
•We sell good quality food at reasonable prices.
affordable • • inexpensive • • economical • • cheap • |especially business competitive •
Opp: unreasonable
reasonable/affordable/economical/cheap/competitive prices/rates/fares
affordable/inexpensive/economical/cheap/competitive products/services

Synonyms:
cheap
competitive • budget • affordable • reasonable • inexpensive
These words all describe a product or service that costs little money or less money than you expected.
cheap • costing little money or less money than you expected; charging low prices. Cheap can also be used in a disapproving way to suggest that sth is poor quality as well as low in price: ▪ a bottle of cheap perfume.
competitive • (of prices, goods or services) as cheap as or cheaper than those offered by other companies; able to offer goods or services at competitive prices.
budget • [only before noun] (used especially in advertising) cheap because it offers only a basic level of service.
affordable • cheap enough for most people to afford.
reasonable • (of prices) not too expensive.
inexpensive • (rather formal) cheap. Inexpensive is often used to mean that sth is good value for its price. It is sometimes used instead of cheap, because cheap can suggest that sth is poor quality.
cheap/competitive/budget/affordable/reasonable prices/fares/rates
cheap/competitive/budget/affordable/inexpensive products/services

Example Bank:
•If companies expect work during personal time, it's only reasonable to allow personal time at work.
•The police apparently thought this explanation perfectly reasonable.
•Be reasonable! We can't work late every night.
•If the price is reasonable, we'll buy it.
•It is reasonable to assume that she knew beforehand that this would happen.
•Most people here have a reasonable standard of living.
•The furniture is in reasonable condition.
•The hotel was reasonable, I suppose.
•to prove sth beyond a reasonable doubt