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Adjective: mousy (mousier,mousiest)  maw-see
  1. Quiet and timid and ineffectual
    - mousey
  2. Infested with mice
    - mousey
  3. Of something having a drab pale brown colour resembling a mouse
    "a mousy brownish-grey colour"; "mousy hair";
    - mousey, mouse-colored [US], mouselike, mouse-coloured [Brit, Cdn]

Derived forms: mousier, mousiest

See also: chromatic, timid