• 劇場げきじょう — Theater
• 悲劇ひげき — Tragedy
• 喜劇きげき — Comedy
• 演劇えんげき — Dramatic performance
• 劇薬げきやく — Strong/violent medicine or chemical
• 劇的げきてき — Dramatic
• 攻撃こうげき — Attack

劇 is a phono-semantic compound: the meaning component is 刂 (sword), indicating something sharp or intense, and the phonetic part is 豦 (derived from the old form of "play" or "drama").

This kanji captures the dramatic or extreme nature of events—both in the performing arts and emotional intensity.

この劇げきは 感動的かんどうてきでした。
This play was very moving.

劇的げきてきな 変化へんかが 起おこった。
A dramatic change occurred.

The reading ゲキ is used across all common compounds. There’s no regularly used kun-yomi reading. This kanji is often used in the arts and expressive writing.