| dubious(adjective, rough, uncertain, unreasonable, doubtful) |
| insignificant(adjective, quiet, mean, lower, poor) |
| overcloud(verb, confuse, hide, conceal, disguise) |
| profound(adjective, hard, complex, deep, mysterious) |
| turbid(adjective, dark, gloomy, cloudy, muddy) |
| uncertain(adjective, clear, rough, difficult, dark) |
| amorphous(adjective, rough, unclear, chaotic, indistinct) |
| anonymous(adjective, strange, unknown, indefinite, unidentified) |
| baffling(adjective, hard, difficult, solid, strange) |
| blacken(verb, cover, protect, dim, shield) |
| blear(verb, adjective, dull, clear, hide) |
| caliginous(adjective, dull, light, dark, gloomy) |
| confusing(adjective, hard, uncertain, vague, unclear) |
| cover up(verb, expression, phrasal verb, cover, alter) |
| dense(adjective, solid, dark, gloomy, gray) |
| devious(adjective, humble, distant, minor, remote) |
| dusk(adjective, dull, dark, gloomy, dim) |
| enshroud(verb, cover, hide, protect, dress) |
| formless(adjective, vague, unclear, chaotic, indistinct) |
| imprecise(adjective, rough, vague, unknown, unclear) |