complimentary和complementary的区别

Question

前一个是免费赠送，赞美的意思，后一个是互补的意思

Answer 1

complimentary:

1. paying or containing a compliment; expressing courtesy, respect, admiration, or praise

2. given free as a courtesy

    a complimentary ticket

complementary:

1. acting as a complement; completing

2. making up what is lacking in one another

    Many plain tiles and complementary borders are also available.

[1] Webster's II New College Dictionary[M]. Houghton Mifflin Harcourt, 2005.

[2] Collins Cobuild. Collins COBUILD advanced learner's English dictionary[M]. Collins Cobuild, 2006.