Matching Pairs Tough MatchingOnline version Match the words with their definitions by L L 1 TOUGH 2 THOUGH 3 TAUGHT 4 THROUGH 5 THOROUGH 6 THOUGHT Past tense of "think" Despite the fact that Past tense of "teach" Done completely; with great attention to detail From one end or side of something to the other Strong enough to deal successfully with difficult conditions or situations Having or causing problems or difficulties.