Marked by little or no ornamentation or decoration:
Threatening or ominous:
Prim and sedate.
The definition of rude is behavior that does not conform to what society says would be polite or good manners or inappropriate subjects of discussion.
Not likely to please; objectionable:
Not pleasant or attractive; disagreeable:
The definition of attractive is rousing interest and pleasure, especially in terms of physical looks.
Not appealing to the senses, as in appearance, taste, or aroma:
Find another word for unattractive. In this page you can discover 17 synonyms, antonyms, idiomatic expressions, and related words for unattractive, like: plain, ugly, frumpish, homely, rude, unappetizing, undesirable, uninviting, uncomely, unlovely and not much for looks.