(figuratively) to wear out with one's heart and soul

Kyūjitai form of 満身: entire body

ease in one's body, relaxation / establishing oneself in the world, making a career for oneself

be successful in life, build a fortune, rise

to learn, to acquire knowledge / to wear (clothes, accessories, etc.), to put on

to devote oneself to / to surrender oneself to

a back gate / (figuratively) the anus, as a homophone for 肛門 and in contrast to 前門 (zenmon, “front gate”, figurative for vagina)

follow, tag along

(aeronautics) trailing edge

(anatomy) an occiput