| go into(verb, expression, phrasal verb, action, turn) |
| gouge out(verb, expression, phrasal verb, action, weaken) |
| hoe(verb, turn, produce, clean, discover) |
| hollow(verb, expand, mine, excavate) |
| hollow out(verb, expression, phrasal verb, weaken) |
| inquire(verb, action, investigate, research) |
| investigate(verb, action, turn, produce, clean) |
| jump into(verb, expression, phrasal verb, action, investigate) |
| leave no stone unturned(verb, expression, idiom, action, investigate) |
| look into(verb, expression, action, burrow) |
| probe(verb, action, turn, produce, clean) |
| prospect(verb, action, investigate, probe) |
| ransack(verb, action, investigate, probe) |
| really get into(verb, expression, idiom, phrasal verb, action) |
| research(verb, action, investigate, probe) |
| root out(verb, expression, phrasal verb, turn, produce) |
| rummage(verb, action, investigate, probe) |
| seek(verb, action, investigate, probe) |
| sift(verb, action, turn, produce, clean) |
| trowel(verb, action, investigate, immobilize) |