Inform is a verb that means to give knowledge or information to someone. The crossword solutions for the term INFORM include SING (4 letters), WIRE (4 letters), FIRE (4 letters), ALERT (5 letters), RAT (3 letters), TEACH (5 letters), CLUE (4 letters), BETRAY (6 letters), TELL (4 letters), BRIEF (5 letters), ADVISE (6 letters), CLUEIN (6 letters), NOTIFY (6 letters), APPRISE (7 letters), and LETKNOW (7 letters). These words all have to do with providing information to someone, either directly or indirectly.