"squealing" in the verb sense
1. squeal, oink
utter a high-pitched cry, characteristic of pigs
2. confess, squeal, fink
confess to a punishable or reprehensible deed, usually under pressure
"squealing" in the adjective sense
1. screaky, screechy, squeaking, squeaky, squealing
having or making a high-pitched sound such as that made by a mouse or a rusty hinge
Source: WordNet® (An amazing lexical database of English)
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