サ行変格活用
サ
ぎょ
う
へ
ん
か
く
か
つ
よ
う
Meanings
1
s-stem irregular verb conjugation
A grammatical term referring to the irregular conjugation pattern of the verb する (suru) and its compounds. The only verb in this class is する, which has unique forms such as し (shi), せ (se), and さ (sa) in its stem.
"Suru" is the only verb with s-stem irregular conjugation.
In s-stem irregular conjugation, the irrealis forms include "shi," "se," and "sa."