推量形

Noun

 * 1)  conjectural form

Usage notes
In modern Japanese, the conjectural form of godan verbs are formed with the auxiliary, which attaches to the of the verb which ended in -a. The a in the stem and the u in the auxiliary contracted to ō, which is spelled o + u in modern kana orthography and can be reanalysed as such.
 * : +  →, which can be reanalysed as from a stem * +.

The term can refer to either the whole conjugated form (kakō) or the pseudostem ending in -o (kako-).

The conjectural form of other verb classes undergoes no contraction, thus the term either refers to the whole conjugated form or is synonymous with.