| upsetting(noun, adjective, hard, tough, severe) |
| abstract(hard, obscure, complex, tricky, complicated) |
| complicating(verb, adjective, complicating) |
| discomposing(hard, severe, offensive, distressing, upsetting) |
| dismaying(adjective, hard, severe, offensive, distressing) |
| distracting(verb, false, awkward, uneasy, ambiguous) |
| entangling(verb, complicating) |
| inscrutable(adjective, obscure, dark, sophisticated, mysterious) |
| occult(adjective, dark, strange, uncertain, mysterious) |
| strange(adjective, odd, unfamiliar, bizarre, outlandish) |
| tangled(adjective, hard, obscure, difficult, complex) |
| tough(adjective, difficult, laborious) |
| uncertain(adjective, hard, severe, obscure, difficulty) |
| Byzantine(adjective, hard, fancy, obscure, difficult) |
| bothering |
| confusion(noun, uncertainty, perplexity, bewilderment, puzzlement) |
| doubtful(dark, uncertain, mysterious, unclear, indistinct) |
| enigmatical(adjective, hard, difficult, strange, striking) |
| flustering(verb, confusing) |
| hard(adjective, fancy, obscure, difficult, complex) |