noun, noun which may take the genitive case particle 'no'
Used for the lowest rank, position, or quality. Often appears in compounds like 最下位 (lowest rank) or 最下層 (lowest stratum).
彼の成績はクラスで最下だった。
His grades were the lowest in the class.
このチームはリーグ最下に沈んでいる。
This team is stuck at the bottom of the league.
Compound of 最 (most) and 下 (below, bottom). The reading さいか is the on'yomi for both characters.