| concentrate(verb, think, deliberate, fabricate, speculate) |
| hammer away at(verb, expression, idiom, phrasal verb, settle) |
| puzzle(verb, confuse, baffle, perplex, wonder) |
| attend(verb, settle, establish, put, think) |
| be engrossed in(verb, settle, establish, put, think) |
| bring to bear(verb, expression, idiom, settle, establish) |
| brood over(verb, expression, phrasal verb, settle, establish) |
| center(verb, settle, establish, put, think) |
| consider closely(verb, expression, settle, establish, put) |
| contemplate(verb, settle, establish, put, think) |
| direct attention(verb, expression, settle, establish, put) |
| examine(verb, settle, establish, put, think) |
| fix attention(verb, expression, settle, establish, put) |
| fixate(verb, settle, establish, put, think) |
| focus attention(verb, expression, settle, establish, put) |
| get on the beam(verb, expression, idiom, settle, establish) |
| give attention(verb, expression, settle, establish, put) |
| hammer(verb, settle, establish, put, think) |
| head trip(verb, expression, settle, establish, put) |
| meditate(verb, settle, establish, put, think) |