animus

Saying you have animus toward a person is a fancy way of saying that you hate their guts. You could also say that an animus exists between two people. That's when they hate each others' guts.

If you're familiar with the word animosity, meaning bad feelings, you're only a hop, skip, or jump away from understanding animus. But then it gets tricky. The word can also mean a motivating force––you could refer to the fear of infection as the animus behind a movement to sterilize public buildings.

Definitions of animus
1

n a feeling of ill will arousing active hostility

Synonyms:
animosity, bad blood
Type of:
enmity, hostility, ill will
the feeling of a hostile person

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