noun · an official document, identification card, or credential

因为忘带了证，他没法进入考场。

verb, noun · to demonstrate, verify, or provide evidence for the truth of something

证据确凿，足以证其有罪。

noun · in traditional Chinese medicine, a pattern of symptoms or signs representing the body's physiological or pathological state.

这类排尿困难的症状属于淋证。