MOUSY is validvalid

resembling a mouse [adj MOUSIER, MOUSIEST] : MOUSILY [adv], MOUSINESS [n]

10,701 of 196,601 in NWL2023·also valid in CSW24

like a mouse; timid; grey, also MOUSEY [adj MOUSIER, MOUSIEST, MOUSILY] / a diminutive of mouse [n MOUSIES]