I need a word that fits this description: something that completes somthing else.

Answer 1

Do you want a noun? Maybe something's compliment or match.

Answer 2

Like I want to say she completed the family. She was the _________.

I need a word for the blank.

Answer 3

http://www.answers.com/complement

(not compliment)

Answer 4

So I would say she was the complement?

Answer 5

You can, yes.