Is Peri a word root?

peri-, prefix. peri- comes from Greek, is attached to roots, and means “about, around”:peri- + meter → perimeter (= distance around an area);peri- + -scope → periscope (= instrument for looking around oneself). peri- also means “enclosing, surrounding”:peri- + cardium → pericardium (= a sac surrounding the heart).

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