| start(verb, ignore, refuse, confuse, quit) |
| stop(verb, ignore, refuse, confuse, quit) |
| strong |
| substantial(adjective, clear) |
| surrender(verb, ignore, refuse, confuse, quit) |
| take out(verb, expression, phrasal verb, ignore, refuse) |
| thick(adjective, heavy) |
| translucent(adjective, clear) |
| uncertain(adjective, dull, obscure) |
| unclear(adjective, dull, obscure, uncertain) |
| undermine(verb, ignore, refuse, confuse, quit) |
| undiluted(adjective, strong) |
| unfasten(verb, ignore, refuse, confuse, quit) |
| unfix(verb, ignore, refuse, confuse, quit) |
| unintelligible(adjective, dull, obscure, uncertain) |
| unseal(verb, ignore, refuse, confuse, quit) |
| unsettle(verb, ignore, refuse, confuse, quit) |
| unstick(verb, ignore, refuse, confuse, quit) |
| vague(adjective, dull, obscure, uncertain) |
| withdraw(verb, ignore, refuse, confuse, quit) |