The word "sullen" in English means: Bad-tempered and not wanting to speak to people, Showing silent anger and unwillingness to be cooperative or friendly..
The phonetic transcription of "sullen" is /ˈsʌlən/ in British English and /ˈsʌlən/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "sullen": grumpy, glum, sulky, sour, morose.
Example usage of "sullen": "He looked very sullen after losing the game, his face dark with displeasure.". More examples on the page.