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peripheral
adjective
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How to pronounce peripheral:

Definition of peripheral:

peripheral (adjective):
not relating to the most important part of something
of, relating to, involving, or forming a periphery or surface part
on or near an edge or constituting an outer boundary; the outer area.

Synonyms for peripheral:

accessoryencirclingmarginalirrelevantsupplementarytangentialunimportantminorsuperficialinessential
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Antonyms for peripheral:

rudimentarytrueheadsalientstaplequintessentialprinciplecrucialutmostprominent
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Other 4-syllable words like peripheral

Here are some other common words that have 4 syllables, like peripheral does.

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