虚

Kanji: 虚
Level: N1
Meaning: void
On'yomi: キョ, コ
Kun'yomi: むな.しい
Strokes: 11
Common compounds: 虚偽 (きょぎ, falsehood) 虚栄 (きょえい, vanity)
Memory hook: A tiger (虎) at a hill (丘) leaving a void (虚).