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

a dependent, a parasite / a nuisance, a troublemaker

driving off a troublesome person, getting rid of a nuisance, good riddance

Same as above.

(computing) name resolution

unsolved, unresolved

(attributively) unsolved

(colloquial) current boyfriend

everything

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)