fine rain, drizzle
霂 centers on light, gentle precipitation: fine rain or drizzle, the kind that softly mists the air rather than pouring down.
霂 combines 雨 (rain) with 沐, which likely contributes the sound and relates to washing or moisture, together suggesting a light rain or drizzle.
Rain 雨 falls gently onto a tree 木 by the water 氵, creating a soft drizzle that moistens everything without heavy downpour.
For ボク, imagine a fine drizzle falling on a boxwood tree: box -> ボク, and the misty rain keeps the boxwood fresh.
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