苔むす こけむす Also written 苔生す Meanings Godan verb, Intransitive to become covered in moss; to become mossy; to grow over with moss to become aged; to grow old Kanji 苔 moss; lichen. Read as こけ. Example sentences 転石苔むさず。A rolling stone gathers no moss. 転がる石に苔むさず。A rolling stone gathers no moss. Jinuma: Japanese Dictionary · Word lists