(uncommon) thirty / (uncommon) thirty years of age

brains

Alternative form of 脇

やらみそ: (colloquial, humorous) "yaramiso", describes the situation or person who had no sexual experience till about 30 years old

the last day of a month / any of the last few or ten days of a month in the lunar calendar

the final day of a month / the thirtieth day of a lunar month

camisole

(idiomatic, especially a child) to be on the verge of tears

use one thing for many purposes / work someone hard

to use one's head