masturbation (manual erotic stimulation of the genitals)

何: interrogative pronoun; what

何か: something

Used other than figuratively or idiomatically: see なに, これ.

何者: someone; anyone / 何物: what

whatchamacallit, X

to come back, to return, to go back to

(honorific) a lord, a landowner / an honorific form of reference for a scholar or teacher, or one's own father / an honorific form of reference for the addressee

a large person / a giant / an adult / a person of high rank, a ruler or noble / an honorific form of reference for a scholar or teacher, or one's own parent / a daimyo

an adult, a grown-up / (Buddhism) the Buddhas and bodhisattvas