滴
dī · HSK 6
a drop
💧 水 (water) + 啇 (phonetic dī) = a drop that drips
The 氵 radical on the left marks anything water-related; 啇 on the right carries the dī sound. Common in 一滴 (yī dī, one drop) and 滴水 (dī shuǐ, dripping water).
滴 — water radical 氵 + 啇 (phonetic)
A semantic-phonetic compound. The water radical 氵 gives the meaning 'liquid,' while 啇 (dī/dí) supplies the sound. Originally referred to water falling drop by drop, and by extension came to mean 'a drop' as both verb and measure word.