| oppressive(adjective, hard, difficult, complex) |
| precarious(adjective, hard, difficult, complex) |
| profound(adjective, hard, difficult, complex) |
| rugged(adjective, hard, difficult, unpleasant, complex) |
| taxing(adjective, hard, difficult, complex) |
| tough(adjective, hard, difficult, complex) |
| trying(adjective, hard, difficult, complex) |
| desperate(adjective, intense, awful, terrible, horrible) |
| direful(adjective, awful, terrible, fear, horrible) |
| disastrous(adjective, awful, terrible, miserable, painful) |
| evil(adjective, awful, black, atrocious, harmful) |
| bad(adjective, unpleasant, awful, terrible, vicious) |
| heinous(adjective, awful, terrible, horrible, afraid) |
| abominable(adjective, awful, terrible, horrible, afraid) |
| distressing(adjective, severe, tender, unpleasant, awful) |
| monstrous(adjective, awful, terrible, horrible, afraid) |
| wretched(adjective, awful, terrible, horrible, afraid) |
| acute(adjective, severe, important, significant, extreme) |
| calamitous(adjective, severe, unpleasant, awful, terrible) |
| catastrophic(adjective, awful, terrible, miserable, painful) |