| risky(adjective, open, delicate, uncertain, significant) |
| hazardous(adjective, difficult, delicate, uncertain, significant) |
| dangerous(adjective, adverb, open, difficult, delicate) |
| sensitive(adjective, hard, difficult, delicate, uncertain) |
| perilous(adjective, adverb, upset, open, difficult) |
| unstable(adjective, upset, change, understanding, strong) |
| tricky(adjective, understanding, hard, keen, fine) |
| insecure(adjective, upset, change, strong, delicate) |
| shaky(adjective, upset, change, strong, open) |
| unsteady(adjective, change, strong, uncertain, doubtful) |
| problematic(adjective, hard, open, difficult, complex) |
| uncertain(adjective, upset, difficult, delicate, uncertain) |
| difficult(adjective, hard, complex) |
| tight(adjective, hard, difficult, complex, troublesome) |
| rugged(adjective, hard, difficult, informal, complex) |
| thorny(adjective, hard, difficult, complex) |
| serious(adjective, hard, difficult, complex, dangerous) |
| grave(adjective, hard, difficult, complex, dangerous) |
| sticky(adjective, hard, difficult, complex) |
| trying(adjective, hard, difficult, complex) |