| penetrating(adjective, strong, slight, keen, sharp) |
| unfathomable(adjective, hard, complete, obscure, difficult) |
| great(adjective, strong, hard, intense, powerful) |
| abysmal(adjective, complete, deep, surface, extent) |
| acute(adjective, strong, great, keen, sharp) |
| heartfelt(adjective, feeling, great, warm, intense) |
| secret(adjective, obscure, deep, thoughtful, intimate) |
| keen(adjective, strong, great, sharp, smart) |
| knowledgeable(adjective, smart, bright, deep, intelligent) |
| obscure(adjective, hard, complex, deep, mysterious) |
| sage(adjective, smart, bright, sensible, deep) |
| shrewd(adjective, knowledge, sharp, smart, sensible) |
| sincere(adjective, great, warm, intense, passionate) |
| subtle(adjective, quiet, hard, slight, fine) |
| intellectual(adjective, bright, deep, intelligent, thoughtful) |
| consummate(adjective, great, intense, full, emotional) |
| deep-seated(adjective, great, intense, emotional, essential) |
| erudite(adjective, knowledge, deep, intelligent, thoughtful) |
| exhaustive(adjective, great, complete, intense, full) |
| mysterious(adjective, hard, obscure, delicate, complex) |