WordWeb Online

1. Having or making a high-pitched sound such as that made by a mouse or a rusty hinge
   "The alarm on the heart monitor was going crazy, squealing as the line traced a chaotic dance of death across the screen"
   - screaky, screechy, squeaking, squeaky

1. Utter a high-pitched cry, characteristic of pigs
   - oink
    
2. Admit to the truth, particularly in the context of sins or crimes committed
   - confess, fink [N. Amer]

See also: high, high-pitched, squealer

Type of: acknowledge, admit, emit, let loose, let out, utter