| investigate(verb, challenge, demand, request, question) |
| probe(verb, request, question, inquire) |
| examine(verb, challenge, demand, request, question) |
| hunt |
| ask(verb, request, question, inquire) |
| buzz(challenge, demand, request, question, inquire) |
| canvass(challenge, demand, request, question, inquire) |
| catechize(challenge, demand, request, question, inquire) |
| cross-examine(challenge, demand, request, question, inquire) |
| direct(challenge, demand, request, question, inquire) |
| enjoin(challenge, demand, request, question, inquire) |
| fathom |
| give the third degree(expression, idiom, challenge, demand, request) |
| go into |
| go over(expression, challenge, demand, request, question) |
| grill(challenge, demand, request, question, inquire) |
| hit(challenge, demand, request, question, inquire) |
| hunt for(expression, challenge, demand, request, question) |
| hunt through |
| inquire(challenge, demand, request, question) |