訓 やす(む) ・ 音 キュウ
Sino-Vietnamese: hưu
The 亻 (person) radical leaning against 木 (tree): someone propped against a trunk taking a break. Person plus tree equals rest.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
今日は仕事を休みます。 (きょうはしごとをやすみます)
I will take a day off work today.