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:

local self-government, autonomy

(grammar) inversion

(slang) person who lives outside of the major Japanese metropolitan areas (often in reference to hindered access to physical forms of cultural phenomena such as promotional events)

ichthyological

the second dimension / (by extension, Internet slang) the 2D (i.e. anime, manga, video games, etc.) world; the fictional world