铁证

Traditional form:

鐵證

Pinyin (reading):

tiězhèng

Definitions:

• ironclad evidence
• conclusive proof

Characters:

• 铁 - iron; strong, solid, firm
• 证 - to prove, to verify; certificate, proof

Traditional characters:

• 鐵 - iron; strong, solid, firm
• 證 - to prove, to verify; certificate, proof