concentrate

Kyūjitai form of 収入: income, earnings, receipts

the inside of the body, somewhere inside the body

回虫: intestinal worm

(pathology) roundworm, intestinal worm, worms of the order Ascaridida.

宇宙飛行士: an astronaut (member of the crew of a spaceship or other spacecraft, or someone trained for that purpose)

(archaic) the central location of some larger geographic area

a harmful insect, an insect pest

(slang) Big breasts.

small breasts / someone who is flat-chested