凝

Kanji: 凝
Level: N1
Meaning: congeal
On'yomi: ギョウ
Kun'yomi: こ.る, こ.らす
Strokes: 16
Common compounds: 凝視 (ぎょうし) staring 凝固 (ぎょうこ) coagulation
Memory hook: Ice forms on the window when it gets cold.