Word parts proper + -ly Pronunciation (US) IPA (key): /ˈprɑ.pɚ.li/ (UK) IPA (key): /ˈprɒ.pə.li/ Audio (US)(file) Hyphenation: prop‧er‧ly Adverb Positive properly Comparative none Superlative none If you do something properly, you do it in the right way. Synonym: correctly Antonym: improperly We need to make sure that police are properly trained. How much of him have I not properly understood? The chemical is vital for cells to function properly. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads