sexy
6 antonyms and opposites of sexy, grouped by meaning.
Adjective — Sexually attractive or appealing.
Antonyms
Etymology
From sex + the adjective-forming suffix -y.
Full origin of sexy →Frequently asked questions
Is sexy a formal or informal word?
Sexy is informal and casual, at home in everyday conversation, advertising, and entertainment rather than formal writing. In more serious or professional settings, people tend to choose words like attractive, appealing, or striking. It carries a playful, modern tone that suits relaxed speech far better than official documents.