distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

lateral thinking

thinking ability, intellect, mental capacity

thought experiment

(computing) name resolution

unsolved, unresolved

(attributively) unsolved

(colloquial) current boyfriend