打雷
dǎ léi · HSK 4
clap of thunder
⚡ 打 = strike/hit + 雷 = thunder; literally 'to strike thunder'
打 is the all-purpose verb for 'hit/do' (also in 打电话 make a call, 打篮球 play basketball). 雷 alone means thunder, so 打雷 = thunder doing its hitting — the rumble itself.
打 — hand radical 扌 + nail 丁
打 combines the hand radical 扌 (action with the hand) with 丁 (originally a nail), suggesting striking or hitting with the hand. 丁 also serves as a phonetic hint in older readings. The meaning broadened from 'to strike' to a general verb for many hand-based actions, like 打电话 'make a phone call'.