The term 'add one's two cents' is an idiom that means to give one's opinion or thoughts on a matter. The crossword solutions for this term are OPINE (5 letters), CHIMEIN (7 letters), and WEIGHIN (7 letters). OPINE means to express an opinion, CHIMEIN means to join in a conversation or discussion, and WEIGHIN means to offer one's opinion or contribution. All three words can be used to describe the act of adding one's two cents.