fog, mist
霧 centers on atmospheric obscurity: fog or mist that reduces visibility and creates a hazy, unclear environment.
霧 combines 雨 (rain) with 務, which likely contributes the sound and the idea of something covering or obscuring, together suggesting atmospheric moisture that obscures vision.
Rain 雨 falls and mixes with the idea of duty or task 務, like a thick fog that makes every task harder to see and complete.
For ム, imagine a cow mooing in the fog: moo -> ム, and the sound is muffled by the mist.
fog; mist
morning fog; morning mist
atomizing; spraying
heavy fog; dense fog; thick fog
drizzle; light rain
spraying
dispersing; vanishing
rime; hoarfrost; silver frost
vanishing like mist
totally at a loss; lose one's bearings; in a maze; in a fog; all at sea; up in the air; mystified; bewildered
night fog
haze; mist; fog; smog
inland fog
winter fog; fog during winter
spray drying
sprayer; vaporizer; vaporiser; atomizer; atomiser; nebulizer
summer fog; summer mist
evening mist
mountain fog
river mist