| obstacle |
| rattle(verb, stop, upset, trouble, disturb) |
| regulate |
| addle(verb, upset, trouble, disturb, obscure) |
| astound(verb, shock, confuse, mistake, throw) |
| blind |
| defy(verb, challenge, resist, frustrate, confront) |
| hassle(noun, verb) |
| mix up(verb, expression, phrasal verb, upset, shock) |
| queer(verb, stop, ruin, oppose, curb) |
| resist(verb, disregard, hinder, challenge, frustrate) |
| ruin(verb, stop, upset, prevent, hinder) |
| stupefy(verb, upset, dull, shock, confuse) |
| astonish(verb, upset, trouble, obscure, shock) |
| buffalo(verb, stop, disturb, halt, curb) |
| catch(verb, cheat, trick, hinder, deceive) |
| counteract(verb, stop, hold, control, reduce) |
| curb(verb, stop, control, check, reduce) |
| daunt(verb, discourage, deter, alarm, intimidate) |
| enigma |