rat
UK: ræt | US: ræt
n. 1. A small rodent with a long tail, typically considered a pest.
n. 2. (Slang) A disloyal or deceitful person.
v. 3. (Informal) To betray or inform on someone.
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The word "rat" originates from Old English ræt, likely derived from Proto-Germanic rattaz. Its exact earlier roots are uncertain, but it may be linked to imitative origins (reflecting the sound or movement of the animal). Over time, "rat" evolved metaphorically to describe treachery, influenced by the rodent's scavenging behavior and negative cultural associations.
The lab used a rat for behavioral experiments.
He felt like a rat after betraying his friend.
She refused to rat on her teammates despite pressure.
Rats scurried through the abandoned building.
In the story, the villain was portrayed as a greedy rat.