Unattractive (adjective)

Not pleasing or appealing to the eye or other senses; not attractive.

Origin:

Late 18th century: from un- (expressing negation) + attractive.

Examples:

1. The building had an unattractive appearance.
2. The food was unattractive and unappetizing.
3. The dress was unattractive and unflattering.
4. The design was unattractive and outdated.
5. The room had an unattractive color scheme.