由

Kanji: 由
Level: N3
Meaning: reason, wherefore
On'yomi: ユ,ユウ,ユイ
Kun'yomi: よし
Strokes: 5
Common compounds: 理由 (りゆう) reason, 自由 (じゆう) freedom
Memory hook: Sprout coming up from the ground for a reason.