| master(verb, grasp, understand, learn, proficient) |
| bone up(verb, expression, study, consider, mind) |
| catch on(verb, expression, fix, check, determine) |
| check(verb, determine, discover, confirm, divine) |
| check out(verb, expression, fix, determine, discover) |
| check up on(expression, idiom, fix, check, determine) |
| dig(verb, study, fix, check, consider) |
| discover(verb, fix, check, determine, confirm) |
| double-check(verb, fix, check, determine, discover) |
| establish(verb, fix, determine, discover, confirm) |
| eye(verb, fix, check, determine, discover) |
| eyeball(verb, fix, check, determine, discover) |
| find out(verb, expression, fix, check, determine) |
| fix(verb, check, determine, discover, confirm) |
| get down cold(verb, expression, idiom, fix, check) |
| get down pat(verb, expression, idiom, fix, check) |
| get hold of(verb, expression, idiom, fix, check) |
| get it down(expression, idiom, fix, check, determine) |
| get the hang of(verb, expression, idiom, phrasal verb, fix) |
| hit the books(verb, expression, idiom, study, consider) |