one's backside / the back, the rear (both spatially and temporally)

the rear, back, or backside of something / the rearward or backward direction / the portion of a palace where a queen or other female imperial consort lives

later, afterwards, some time after the present

after

prefixing element in kanji compounds, adding a meaning of later, after, following, rearward

subsequently, afterwards

(後 "spatially behind") to depart from; to leave / (後 "temporally later") to put off something, to be dealt with later

doing something later, producing something later; that which is done or made later / posterity, those who will live later, people in the future

電話を切る: to hang up, to terminate a phonecall

悪戯電話: prank call