predicative form; dictionary form; plain form
In traditional Japanese grammar, the form of a verb or adjective used at the end of a sentence; also the lemma form listed in dictionaries.
「書く」の終止形は「書く」です。
The predicative form of 'kaku' is 'kaku'.
In classical grammar, the predicative form and the attributive form were distinguished.
From 終止 (shūshi, 'ending') + 形 (kei, 'form'). A technical term from traditional Japanese grammar.