大会: convention / 大海: large sea, ocean / 退会: withdrawal, especially from a group of some kind

退会: withdraw

平ら: flatness

平ら: flat, even, level, smooth, having no variation in altitude

平: a male given name / 平: a surname

太平:

a judicial official; a lawyer or attorney

a window facing a stand of mugwort / (by extension) a poor country house

a window in a small boat with a thatch roof

(obsolete) in ancient Japan, the role driving away devils at a certain religious ceremony, or the driver of the hearse carrying the coffin of a deceased emperor