震动
zhèndòng · HSK 7
shake
📳 震 (quake) + 动 (move) = a quaking movement, a vibration
震 is the quake/tremor in 地震 (earthquake); 动 means to move. Stack them and you get shaking motion: 震动 = vibrate or shock. A buzzing phone on 震动 mode is in quake-move mode.
震 — rain radical 雨 + chen 辰 (phonetic)
A semantic-phonetic compound: 雨 'rain' gives the meaning (weather/sky phenomena), while 辰 supplies the sound. Originally referred to thunder and the shaking it causes, then extended to mean 'shake, quake, tremble' as in earthquakes (地震).
动 — force 力 + heavy/重 (simplified from 動)
The traditional form 動 combines 重 (heavy) as the phonetic with 力 (force/strength) as the semantic, suggesting the effort needed to move something heavy. The simplified form 动 replaces 重 with 云, keeping 力 to convey action and motion.