| penetrate(verb, study, cut, check, drive) |
| sound(noun, verb, grasp, understand, seize) |
| dig(verb, action, study, check, consider) |
| inquire(verb, action, study, check, separate) |
| go into(verb, expression, phrasal verb, action, study) |
| inspect(verb, study, meet, check, consider) |
| scrutiny(noun, study, check, measure, review) |
| dig into(verb, expression, phrasal verb, study, check) |
| delve(verb, action, study, consider, touch) |
| delve into(verb, expression, phrasal verb, study, check) |
| enquiry(noun, inquest) |
| experiment(noun, verb, study, check, taste) |
| inspection(noun, study, check, review, conclusion) |
| pry(verb, study, check, consider, determine) |
| quest(noun, verb, study, check, determine) |
| fathom(verb, separate, grasp, understand, drain) |
| inquire into(verb, expression, phrasal verb, study, check) |
| question(noun, verb, study, check, consider) |
| comb(verb, study, check, separate, consider) |
| grope(verb, meet, check, touch, hit) |