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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 pooches, but planning ahead can help a lot.

From The Wall Street Journal • Mar. 25, 2026

Unfamiliar places bring out everyone’s insecurities, and if the person who has long claimed to have your back doesn’t make you feel safe, that’s a problem.

From Salon • Mar. 10, 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

That day, Ms. Laverne pushed us out—from the Familiar to the Unfamiliar.

From "Harbor Me" by Jacqueline Woodson

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