challenge, contend for, make love to

Radicals

• 挑戦【ちょうせん】
  challenge, defiance, dare, attempt, try
• 挑む【いどむ】
  to challenge to (a fight, game, etc.), to throw down the gauntlet, to contend for, to tackle (e.g. a problem), to attempt, to go after (a prize, record, etc.), to pressure (someone) for sex, to make advances to