贺电
hè diàn · HSK 7
congratulatory telegram
🎉⚡ 贺 (congratulate) + 电 (electric, short for 电报 telegram) = a congratulatory wire
电 — rain 雨 + lightning tail 电
Originally a pictograph of lightning streaking from a cloud, written 電 with the rain radical 雨 on top. The bottom 电 depicts the zigzag flash itself. The simplified form 电 drops 雨 and keeps just the lightning shape. Meaning extended from 'lightning' to 'electricity' in modern usage.