証

証

Proof; evidence; testimony.

In this sentence, '証' is used to mean 'proof' or 'evidence,' indicating something that demonstrates or validates an assertion.

これは彼の努力の証です。

This is proof of his effort.

Here, '証' refers specifically to 'evidence' or 'collected proofs,' which are necessary for confirming facts or situations, often used in investigative contexts.

証を集めることが重要です。

Gathering evidence is important.

In this sentence, '証' is paired with '科学的' (scientific) to denote 'scientific proof,' emphasizing its role as verified evidence supporting scientific conclusions.

薬の効果は科学的証によって確認された。

The drug's efficacy was confirmed by scientific evidence.