| abstruse(adjective, hard, fancy, obscure, difficult) |
| active(adjective, bright, energetic, lively, vigorous) |
| comprised(verb, adjective, included) |
| immersed(verb, adjective, happy, full, concerned) |
| implicated(verb, adjective, keen, sympathetic, excited) |
| obscure(adjective, hard, difficult, complex, sophisticated) |
| perplexing(adjective, hard, fancy, obscure, difficult) |
| time-consuming |
| participative |
| confounded(verb, adjective, complicated) |
| connected(verb, adjective, touching, united, linked) |
| deep(adjective, hard, obscure, complex, full) |
| encompassed(verb, adjective, included) |
| enmeshed(verb, adjective, included) |
| fascinated(verb, adjective, keen, sympathetic, attentive) |
| occupied(verb, adjective, keen, happy, lively) |
| puzzling(adjective, hard, fancy, obscure, difficult) |
| snarled(verb, adjective, obscure, sophisticated, unsettled) |
| absorbed(verb, adjective, keen, happy, full) |
| confusing(adjective, hard, complex, tricky, complicated) |