-dad, -tad
Suffix used to form abstract nouns from adjectives.
From Latin -tatem, accusative of -tas 'id.'
From Proto-Italic *-tāts 'id.' From Proto-Indo-European *-teh2ts 'id.'
Indo-EuropeanRomance
Asturian -tá, Portuguese -dade, Galician -dade, Catalan -tat, French té, Italian -ità, Aromanian -tati, Romanian -tate