席
セキ, むしろ

seat, mat, occasion, place

JLPT3 G4 S10 F370

An abbreviated form# of 庶 (pile) + 巾 cloth → pile seating mats on the ground/floor (for a feast) → *mat* → *rank*; *post*; *position*; *seat* (← determining the placement of one's seating mat). Also, *spread* (a mat) and *cushion*.

[Full Kanji Etymology List]