(a) To be aware of (sth.) as a fact; know (that sth. is true, has happened, etc.); (b) with that clause or pronoun and that clause; (c) with who, which, what, when, wher, hou, or whi clause; (d) with……

(a) To fail (to do sth.); decline (to do sth.); also, disobey a command (that one do sth.) (b) to eschew (joy, a vice, etc.); refuse (a gift, food, etc.); also, decline (an office); (c) to resist……