後 - behind, back, later

a day after the fair; (at a) stage when it's too late

back; behind; rear

after school (at the end of the day)

after the end (of something)

after this; from now on; hereafter

in three days' time; two days after tomorrow

old age

after death; posthumously

day after tomorrow

postoperative; after surgery

one's junior; younger generation; next generation

backing; support; backer; supporter; patron; sponsor