glib
lies
honest
Ingenious means clever. That is an ingenious solution; I wish I'd thought of it.
sincere means the truthworthy means beautful
A three letter word that could mean clever is sly.
smart
Serious means paying attention and not joking around Sincere means with truth and honesty.
Your friend is sincere. The friend is sincere.
sincere means the truthworthy means beautful
consideration
frank, fair
A 6-letter word beginning with 'a' that means smart is astute.