倦み疲れる[umitsukareru] to grow weary
倦厭[kenen] weariness
倦怠[kentai] languor
倦怠感[kentaikan] physical weariness
倦怠期[kentaiki] the stage of fatigue

倦憊[kenpai] extreme fatigue
倦む[agumu] to get tired of (doing)
倦る[akiru] to get tired of
攻め倦む[semeagumu] to lose the attacking initiative
待ち倦む[machiagumu] to tire of waiting