孤軍奮闘
Noun
Irregular
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb suru
yojijukugo
fighting alone
孤軍奮闘したけれど、衆寡敵せず、彼のビジネスプランは受け入れられなかったよ。
He put up a brave and lone struggle, but up against such heavy odds he couldn't get his business plan accepted.