こぐんふんとう
fighting alone
Noun, Suru verb
孤軍奮闘こぐんふんとうしたけれど、衆寡しゅうか敵てきせず、彼かれのビジネスプランは受うけ入いれられなかったよ。
He put up a brave and lone struggle, but up against such heavy odds he couldn't get his business plan accepted.