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Verb: yammer  ya-mu(r)
  1. Cry loudly, as of animals
    "The coyotes were yammering in the desert";
    - howl, wrawl, yowl
  2. Complain whiningly
    - whine, grizzle, yawp

Derived forms: yammered, yammering, yammers

Type of: complain, emit, kick, kvetch [N. Amer], let loose, let out, moan, plain [archaic], quetch, sound off, utter

Encyclopedia: Yammer