IPA: /ˈsʌl.ki.ər/
KK: /ˈsʌlkiər/
Feeling or showing a sad and silent mood, often because of disappointment or annoyance.
After losing the game, he became sulkier and refused to talk to anyone.
Comparative: sulkier
Superlative: sulkiest
Sulkier → The word 'sulkier' is derived from 'sulky' (from Middle English *sulke*, meaning sullen or moody) and the comparative suffix '-er' (meaning more). Thus, 'sulkier' means more sullen or more moody than someone or something else.
Think of someone who is 'more sullen' or 'more moody' — that's what 'sulkier' describes.