say it: PAHRT-lee
partly is an adverb meaning "to some extent; in some degree; not wholly". It is pronounced /ˈpɑɹtli/ — PAHRT-lee. It carries one recorded sense.
Definitions, synonyms and semantic relations for partly 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.