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

Its natural deodorizing properties help neutralize the unpleasant smells associated with pets, according to Stein. —Daley Quinn, Southern Living, 1 Nov. 2025

The 75-year-old ginkgo trees have been wafting the unpleasant smell into the air at the Northern California park, forcing residents to brave the stench that is comparable to vomit, The Sacramento Bee and SFGATE report. —Natalia Senanayake, PEOPLE, 30 Oct. 2025

If potatoes get too cold, the tubers turn black or become mushy, grainy, and unpleasant to eat. —Lauren Landers, Better Homes & Gardens, 29 Oct. 2025

This man just could not stop getting extorted, which is not ideal for anyone but is especially unpleasant for the head of MI5. —Brian Grubb, Vulture, 29 Oct. 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