unpleasant

adjective

un·​pleas·​ant ˌən-ˈple-zᵊnt 

: not pleasant : not amiable or agreeable : displeasing

unpleasant odors

unpleasantly adverb

Synonyms of unpleasant

• unpleasing
• harsh
• bad
• nasty
• ugly
• bitter
• sour
• horrible
• disgusting
• awful
• disagreeable
• sickening
• unwelcome
• rotten

Examples of unpleasant in a Sentence

I stopped taking the drug because of its unpleasant side effects.

There was an unpleasant smell coming from the basement.

The weather is so unpleasant here.

I like the shop, but the staff are so unpleasant.

Recent Examples on the Web

Look for soft spots, slime, or unpleasant odors, which indicate potential decay. —Megan Hughes, Better Homes & Gardens, 1 Dec. 2025

Taking the time to clean vent covers also prevents buildup that can lead to unpleasant odors, extra noise, or premature wear on your heating and cooling system. —Daley Quinn, Southern Living, 29 Nov. 2025

Clear away clutter, add a mat for wet shoes and address any unpleasant odors. —The Washington Post, San Diego Union-Tribune, 29 Nov. 2025

Being a turkey is a rude zinger thrown at movie and theatrical flops, as well as unpleasant, failure-prone people. —Natalie Escobar, NPR, 26 Nov. 2025

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for unpleasant

• omnipresent
• peasant
• pheasant
• pleasant
• present

Kids Definition

unpleasant

adjective

un·​pleas·​ant ˌən-ˈplez-ᵊnt 

ˈən-

: not pleasant : not friendly or agreeable : displeasing

unpleasantly adverb

unpleasantness noun