interest, n. [concern]; [share], [portion], [part], participation; [advantage], [benefit], [weal], behoof; usury. Antonyms: boredom, ennui, [indifference], [unconcern].
interested, a. [concerned]; prejudiced, [partial]. Antonyms: [disinterested], [unconcerned], bored.
interfere, v. [clash], [conflict]; intermeddle, interpose, intervene.
interference, n. clashing, [collision]; intermeddling, interposition, [intervention].
interlining, n. interlineation.
interloper, n. intruder, interferer.
intermediate, a. [intervening], interjacent; interlocutory (Law).
intermittent, a. remittent, periodical, recurrent.
internal, a. inward, interior, [inside], [inner]; esoteric; [intrinsic]; [inherent].
interpret, v. construe, [translate], [render].