訓 わか(れる) ・ 音 ベツ
Sino-Vietnamese: biệt
刂 (knife) on the right cuts the left part apart. Separating with a blade gives both senses: to part from someone, and to be different.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
それとこれは別です。 (それとこれはべつです)
That and this are different.