an organ for hearing; an auditory organ

difficult / hard, probably impossible

acoustic sense; auditory sense

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

(literary) they (about women or girls)

the largest parts of an organism; organ

to hear, to listen / to obey / to ask a question / to smell, sniff

music

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