complimentary

/ˌkɑmpləmˈɛntəri/
adjective
  1. Given free of charge, as a courtesy or favor.
    • The airline gave us a complimentary upgrade to first class.
    • The hotel offers a complimentary breakfast for all guests.
    • We received two complimentary tickets to the concert.
  2. Expressing praise or admiration.
    • He received a complimentary letter from the principal for his volunteer work.
    • The review was very complimentary about the restaurant's service.
    • She made a complimentary remark about his new suit.
Antonyms
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