| sire |
| spoil(verb, cross, frustrate, blank, thwart) |
| stop |
| tangle(noun, verb, difficulty, confusion, confuse) |
| think hard(verb, expression, confuse, baffle, perplex) |
| thwart(verb, block, prevent, hinder, confuse) |
| unlock(verb, fix, do, resolve, have) |
| unravel(resolve, crack, answer) |
| wonder(noun, verb, trouble, concern, anxiety) |
| word game(noun, dilemma, riddle, paradox, enigma) |
| work out(expression, resolve, crack, answer) |
| abstruseness(noun, difficulty, question, uncertainty, secret) |
| acquire |
| ail(verb, upset, bother, provoke, excite) |
| ambiguity(noun, trouble, concern, anxiety, confusion) |
| ambivalence(noun, trouble, concern, anxiety, confusion) |
| annoy(verb, upset, bother, disturb, provoke) |
| arrest |
| arrive |
| ask oneself(verb, expression, confuse, think, doubt) |