負けじ

まけじ

Adverb taking the 'to' particle

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負けじ心まけじごころ

indomitable spirit

負けるが勝ちまけるがかち

he that fights and runs away may live to fight another day; sometimes you have to lose to win; losing is winning

負けじ魂まけじだましい

unyielding spirit; indomitable spirit

負けじとまけじと

indomitably; undauntedly; resolutely; determinedly

言い負けるいいまける

to lose a quarrel; to lose an argument; to be talked down