In a stubborn and uncompromising manner; refusing to listen to reason or change one's position.
Adverbial form of 'bullheaded', created by adding the '-ly' suffix to the adjective, following standard English word-formation patterns.
When you add '-ly' to an adjective to make an adverb, you're often creating a 'manner' word that describes how someone acts—'bullheadedly' tells us the specific way a person behaves, like it's their signature move!
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