prefix
US /ˈpriː.fɪks/
UK /ˈpriː.fɪks/
1.
an affix that is added in front of the word
:
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The word "unhappy" has the prefix "un-".
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Many medical terms use Greek or Latin prefixes.
1.
to add a prefix to (a word)
:
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You can prefix the number with the country code.
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Always prefix your email subject with "[URGENT]" for important messages.