expression
even; also (emphatic object marker)
Emphatic version of the object particle を, adding a sense of 'even' or 'also' to the marked noun. Often used to highlight an unexpected or extreme object.
See also: を
彼は簡単な問題をも間違えた。
He got even the easy questions wrong.
彼女は自分の名前をも忘れてしまった。
She even forgot her own name.