uncommon

Anything uncommon is rare or unusual, like your uncommon last name, which all of your friends have trouble pronouncing.

When you add the prefix un- to common, "occurring or done often," you get its opposite, uncommon. The word's earliest meaning was "not possessed in common," or not owned by everyone, from another meaning of common, "shared by the community." These days, people almost always mean "exceptional" or "not likely" when they describe something as uncommon: "It's uncommon for people to win the lottery, so don't waste your money!"

Definitions of uncommon
1

adj not common or ordinarily encountered; unusually great in amount or remarkable in character or kind

uncommon birds”
“frost and floods are uncommon during these months”
“doing an uncommon amount of business”
“an uncommon liking for money”
“he owed his greatest debt to his mother's uncommon character and ability”
Synonyms:
especial, exceptional, particular, special
surpassing what is common or usual or expected
rare
not widely known; especially valued for its uncommonness
red carpet, red-carpet
special treatment or hospitality
unusual
not commonly encountered
unwonted
out of the ordinary
unusual
not usual or common or ordinary
extraordinary
beyond what is ordinary or usual; highly unusual or exceptional or remarkable
Antonyms:
common
having no special distinction or quality; widely known or commonly encountered; average or ordinary or usual
average, ordinary
lacking special distinction, rank, or status; commonly encountered
democratic, popular
representing or appealing to or adapted for the benefit of the people at large
demotic
of or for the common people
frequent
frequently encountered
general
prevailing among and common to the general public
grassroots
of or involving the common people as constituting a fundamental political and economic group
standard
commonly used or supplied
usual
occurring or encountered or experienced or observed frequently or in accordance with regular practice or procedure
ordinary
not exceptional in any way especially in quality or ability or size or degree
show more antonyms...

adj marked by an uncommon quality; especially superlative or extreme of its kind

“an uncommon sense of humor”
“she was kind to an uncommon degree”
Synonyms:
rare
extraordinary
beyond what is ordinary or usual; highly unusual or exceptional or remarkable

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