• 判断はんだん — judgment / decision
• 評判ひょうばん — reputation / review
• 判決はんけつ — (court) decision
• 判子はんこ — personal seal / stamp
• 裁判さいばん — trial / court hearing
• 判定はんてい — ruling / call (judgment)

The kanji 判 is a 会意形声 (semantic-phonetic) character combining 刀 (knife) and 半 (half), evoking the act of “cutting in two” — i.e., distinguishing or deciding. It later extended to legal judgments and to stamps/seals that certify decisions.

先生せんせいが 正ただしいと 判断はんだんしました。
The teacher judged it to be correct.

書類しょるいに 判子はんこを 押おしてください。
Please stamp the document with your seal.