いど挑idoむmu
1.
To engage in a challenge or contest, actively confronting an opponent or difficult situation with determination and vigor.
2.
To dare to take on a formidable task or competition, displaying a fighting spirit and willingness to face potential failure or risk.
3.
To assert oneself in a situation where there is competition or conflict, not yielding easily while striving for victory or success.
Example:
そのインディアンの群れは、ほんのちょっとでも怒らすと戦いを挑もうとした。