| puzzle(verb, confuse, think, doubt, baffle) |
| wonder(verb, doubt, ponder, perplex, bewilder) |
| be curious(verb, think, doubt, speculate) |
| be inquisitive(verb, think, speculate) |
| conjecture(verb, think, speculate) |
| inquire(verb, think, speculate) |
| meditate(verb, think, speculate) |
| muse(verb, study, perplex, bewilder, mystify) |
| ponder(verb, study, perplex, bewilder, mystify) |
| query(verb, think, speculate) |
| question(verb, think, speculate) |
| speculate(verb, think) |
| think(verb, speculate) |
| addle(perplex, bewilder, mystify) |
| amaze(perplex, bewilder, mystify) |
| baffle(perplex, bewilder, mystify) |
| bamboozle(perplex, bewilder, mystify) |
| beat(perplex, bewilder, mystify) |
| befog(verb, confuse, baffle, perplex, bewilder) |
| befuddle(perplex, bewilder, mystify) |