SYN: Wily, treacherous, designing, dangerous, deceitful, {[ely]?}, crafty, artful.
ANT: Straightforward, sincere, undesigning, innocuous.
=
KEY: Insignificant, [See SIGNIFICANT].
=
KEY: Insincere, [See HARD].
=
KEY: Insinuate.
SYN: Introduce, insert, worm, ingratiate, intimate, suggest, infuse, hint.
ANT: Withdraw, retract, alienate, extract.