钉牢

Traditional form:

釘牢

Pinyin (reading):

dīngláo

Definitions:

• to clinch (a nail)
• to nail down

Characters:

• 钉 - nail, spike
• 牢 - pen, prison, stable; fast, firm, secure

Traditional characters:

• 釘 - nail, spike
• 牢 - pen, prison, stable; fast, firm, secure