B2 adjective /ˌkɒm.plɪˈmen.tər.i/
Complimentary
赠送的;赞美的;作为礼节免费提供
Meaning
expressing praise or admiration; given or supplied free of charge as a courtesy
Example
The hotel offers complimentary breakfast for all guests.
酒店为所有客人提供免费的早餐。