opacity C2 Topic:Describing Qualities US /oʊˈpæsɪti/ See IPA manual Freq #105092 Meanings 1 noun The quality of not allowing light to pass through. We could not see the riverbed because of the opacity of the muddy water. 2 noun The quality of being hard to understand. The opacity of the new tax rules frustrated everyone trying to file their returns. Thesaurus Synonyms 1 noun · the quality of not allowing... opaqueness 2 noun · the quality of being hard... opaqueness More nontransparency Word family Forms opacities Derived forms nonopacityradioopacityradiopacitysemiopacitysubopacity Etymology AI details From opaque + -ity, from French opacité, from Latin opacitas. opacité French View etymology graph -> Topics Describing Qualities Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # opacity **Type:** Word **Level:** C2 **Part of speech:** noun **IPA (US):** /oʊˈpæsɪti/ **Frequency rank:** 105092 ## Meanings 1. The quality of not allowing light to pass through. 2. The quality of being hard to understand. ## Examples - We could not see the riverbed because of the opacity of the muddy water. - The opacity of the new tax rules frustrated everyone trying to file their returns. ## Synonyms - nontransparency - opaqueness ## Derived Forms - nonopacity - radioopacity - radiopacity - semiopacity - subopacity ## Roots and Affixes - Root: opacité ## Etymology From opaque + -ity, from French opacité, from Latin opacitas. ## AI Etymology Opacity is from opaque + -ity, from French opacité, from Latin opacitas. The analysis is mainly morphological: the modern nominal form is built from the named base and affix. Important recorded forms include opacité (French). Current senses include the quality of not allowing light to pass through and the quality of being hard to understand. The wider family includes derived forms such as nonopacity, radioopacity, radiopacity, semiopacity, and subopacity. ## Topics - Describing Qualities - Word Formation & Derivatives markdown