Tra từ complimentary - Từ điển Oxford Advanced Learner 8th

com·pli·men·tary [complimentary complimentaries] BrE [ˌkɒmplɪˈmentri] NAmE [ˌkɑːmplɪˈmentri] adjective
1. given free
•complimentary tickets for the show
2. ~ (about sth) expressing admiration, praise, etc
•a complimentary remark
•She was extremely complimentary about his work.
Opp: ↑uncomplimentary

Which Word?:
compliment / complement
These words have similar spellings but completely different meanings. If you compliment someone, you say something very nice to them: ▪ She complimented me on my English. If one thing complements another, the two things work or look better because they are together: ▪ The different flavours complement each other perfectly.
The adjectives are also often confused. Complimentary: ▪ She made some very complimentary remarks about my English. It can also mean ‘free’: ▪ There was a complimentary basket of fruit in our room. Complementary: ▪ The team members have different but complementary skills.

Example Bank:
•After one or two complimentary remarks about her hosts, she got to the main part of her speech.
•Not all of his comments were complimentary.
•The hotel offers a complimentary breakfast and evening cocktails.