钻心

Traditional form:

鑽心

Pinyin (reading):

zuānxīn

Definitions:

• to sneak in
• to infiltrate
• to be piercingly painful
• to be unbearable (of pain, itch etc)

Characters:

• 钻 - diamond; to bore, to drill, to pierce
• 心 - heart; mind; soul

Traditional characters:

• 鑽 - diamond; to bore, to drill, to pierce
• 心 - heart; mind; soul