say it: uhn-dur-AHRM
underarm is an adjective and adverb meaning "with hand brought forward and up from below shoulder level". It carries 2 recorded senses.
with hand brought forward and up from below shoulder level
“an underhand pitch”
“an underhand stroke”
sport
Definitions, synonyms and semantic relations for underarm 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.