ichidan verb, transitive verb
fail to do; make a mistake in doing; miss doing
Expresses that one attempts an action but fails, makes an error, or misses the opportunity. Attaches to the continuative form of verbs, most commonly する.
大事な書類を送り損ねてしまった。
I failed to send the important documents.
電車に乗り損
I missed the train, so I was late.