Write 座 (zuò) — seat; base; stand; (archaic) suffix used in a respectful form of address, e.g. 师座; classifier for buildings, mountains and similar immovable objects | HSK Ace
HSK 4
座
zuò
seat; base; stand; (archaic) suffix used in a respectful form of address, e.g. 师座; classifier for buildings, mountains and similar immovable objects