• 認識にんしき — recognition, awareness
• 確認かくにん — confirmation
• 認定にんてい — certification
• 認証にんしょう — authentication
• 認可にんか — approval, authorization
• 否認ひにん — denial
• 容認ようにん — tolerance, acceptance

認 consists of the 言 (speech) radical and 忍 (endure). This shows the idea of recognizing or accepting someone's words or claims — often with emotional consideration.

It’s a common kanji in both formal and legal contexts, as well as daily situations like “admitting” a mistake or “recognizing” a person.

自分じぶんの 間違まちがいを 認みとめることは 大切たいせつです。
It’s important to admit your own mistakes.

この証明書しょうめいしょは 正式せいしきに 認定にんていされたものです。
This certificate has been officially certified.

“にん” appears in many legal, formal, or official terms.
“みとめる” is often used in everyday life when someone is acknowledged, accepted, or granted approval.