黙る
だまる · damaru · JLPT N3 · verb-godan
to be silent
🐕 黙 = 黒 black + 犬 dog: the black dog that never barks
The kanji 黙 combines 黒 (black) and 犬 (dog). Old glosses describe a dog that trails people without a sound. For the reading, damaru ends in maru, Japanese for circle or zero, so think of it as zero sound.