squat, seat, cushion, gathering, sit
座 centers on the act of sitting or the place where one sits: a seat, cushion, or a gathering where people sit together. The squat sense is a specific sitting posture.
座 combines 广 (building or roof) with 坐 (sit), suggesting a place under a roof where people sit. The modern form is a straightforward compound of these two components.
Under a roof 广, people 人 sit on the ground 土: that's a seat or a gathering place. Picture a group sitting on cushions inside a building.
For ザ, imagine sitting in a comfortable seat at a jazz club: the smooth sound of jazz (ザ) fills the room while you sit.
to sit (down); to have a seat; to be seated; to kneel (on the floor)
seat; place
course (e.g. of lectures)
account (e.g. bank)
Ginza (district in Tokyo)
seat (esp. in public places or places with assigned seating); seating
sitting
immediate; right there on the spot; impromptu; instant; instantaneous
constellation
throne
zabuton; flat floor cushion used when sitting or kneeling; usu. rectangular
tatami room; tatami mat room; formal Japanese room
chairman
seiza; kneeling with the tops of the feet flat on the floor, and sitting on the soles
zazen (seated Zen meditation, usu. in a cross-legged position)
the whole company; the party; all those present; everyone in attendance
sit-in (protest); sit-down (strike)
implication (in a crime); involvement
congratulations
be; is
immediately; right away; on the spot
account number (bank, etc.)
symposium; round-table discussion