lose interest in, tire of
倦 centers on mental or physical weariness that makes you lose interest or motivation: growing tired of something, becoming fed up, or feeling exhausted by it.
倦 combines the person radical 亻 with 卷, which likely contributes the sound and carries a sense of curling or rolling up, suggesting a person who is mentally or physically curled up from weariness.
A person 亻 beside 卷 (which looks like a rolled-up scroll) suggests someone who has been studying so long they've lost all interest and are tired of it.
For ケン, imagine Ken, a friend who always tires of board games halfway through: Ken -> ケン, and he loses interest just like the kanji meaning.
weariness; fatigue; languor; boredom; tedium; ennui
stage of ennui (esp. in one's married life); period of lassitude; lethargic period; rut
to tire of; to lose interest in; to be too much for one; to find unmanageable; to be beyond one's control; to not know what to do with
tirelessly; perseveringly; without letting up
to grow weary; to get tired of
to get tired of (doing); to lose interest in
weariness
physical weariness; sense of fatigue; washed-out feeling
extreme fatigue