decad C2+ Topic:General Vocabulary US /ˈdɛkæd/ UK /ˈdɛkæd/ See IPA manual Meanings 1 noun a group or set of ten The ancient catalogue was arranged in decads of related entries. Thesaurus Synonyms 1 noun · a group or set of ten decadetentenfolddecuple Word family Related forms decadedecadal Etymology AI details A variant of decade, from Late Latin decas (stem decad-), from Ancient Greek dekás ('group of ten'), from déka ('ten'), from PIE *déḱm̥. dekás Ancient Greek déka Ancient Greek *déḱm̥ Proto-Indo-European View etymology graph -> Topics General Vocabulary External links Google Images Cambridge Dictionary Wiktionary # decad **Type:** Word **Level:** C2+ **Part of speech:** noun **IPA (US):** /ˈdɛkæd/ **IPA (UK):** /ˈdɛkæd/ ## Meanings 1. a group or set of ten ## Examples - The ancient catalogue was arranged in decads of related entries. ## Synonyms - decade - ten - tenfold - decuple ## Related Forms - decade - decadal ## Roots and Affixes - Root: dekás - Root: déka - Root: *déḱm̥ ## Etymology A variant of decade, from Late Latin decas (stem decad-), from Ancient Greek dekás ('group of ten'), from déka ('ten'), from PIE *déḱm̥. ## AI Etymology Decad is a variant of decade, from Late Latin decas (stem decad-), from Ancient Greek dekás ('group of ten'), from déka ('ten'), from PIE *déḱm̥. The etymological trail includes Ancient Greek dekás, Ancient Greek déka, and Proto-Indo-European *déḱm̥. As a noun, decad names a group or set of ten. The same family is visible in related forms such as decade and decadal. ## Topics - General Vocabulary markdown