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Synonyms

unfamiliar

American  
[uhn-fuh-mil-yer] / ˌʌn fəˈmɪl jər /

adjective

  1. not familiar; not acquainted with or conversant about.

    to be unfamiliar with a subject.

  2. different; unaccustomed; unusual; strange.

    an unfamiliar treat.

    Synonyms:
    new, novel, curious

unfamiliar British  
/ ˌʌnfəˈmɪljə, ˌʌnfəˌmɪlɪˈærɪtɪ /

adjective

  1. not known or experienced; strange

  2. not familiar

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of unfamiliar

First recorded in 1585–95; un- 1 + familiar

Explanation

Unfamiliar things are unknown or unexplored. On your first day at a new school, every single face you see is unfamiliar. Traveling in an unfamiliar city is easier with a map or a GPS, and meeting the unfamiliar people who live there is easier if you speak at least a few words of their language. Some people love eating unfamiliar food — things they've never tasted before — while others aren't fond of it. When something (or someone) is familiar, it's known to you — the word shares a Latin root with family. Add the "not" prefix un-, and you've got unfamiliar.

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Vocabulary lists containing unfamiliar

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Unfamiliar surroundings and schedules can be stressful for dogs, but if you plan ahead, you can make the journey a lot more Fido-friendly.

From The Wall Street Journal • Mar. 25, 2026

Unfamiliar districts can drive incumbents to early retirement by severing their connection with well-established constituencies.

From Salon • Dec. 29, 2025

Unfamiliar with the area, I had been preparing to turn left as directed by my sat-nav.

From BBC • Oct. 21, 2023

Unfamiliar with the ways of life in Europe, the Cuban family initially worried whether they would find acceptance.

From Seattle Times • Dec. 11, 2021

Unfamiliar noises and new scents wake me early, and I'm swept into the day.

From "The Belles" by Dhonielle Clayton

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