1.　　chromatic

　　　　The chromatic wheel shows how all the colors relate.

　　　　( highly colored ) 

 

2.　　coalesce

　　　　The members coalesced into one team.

　　　　(to come together to form one group or mass)

 

3.　　unctuous

　　　　I don't trust that unctuous smile - no-one's that nice. What's she hiding?

　　　　(used to describe someone who speaks and behaves in a way that is meant

　　　　to seem friendly and polite but that is unpleasant because it is obviously not sincere)

 

4.　　cryptic

　　　　These cryptic signs have hidden meanings to those who know their secrets.

　　　　(difficult to understand: having or seeming to have a hidden meaning)