say it: ek-STREM-uh-tee
extremity is a noun meaning "an external body part that projects from the body". It carries 5 recorded senses.
an extreme condition or state (especially of adversity or disease)
the outermost or farthest region or point
that part of a limb that is farthest from the torso
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for extremity come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.