οὗτος, αὕτη, τοῦτο, genitive τούτου, ταύτης, τούτου, etc.: the dual feminine never in Attic dialect, see ὁ, ἡ, τό, [near the start]:—demonstrative pronoun, this, common from Refs 8th c.BC+ __A ORIGIN and FORMS: οὗτος, αὕτη, τοῦτο probably arose from a reduplication of the demonstrative ὁ, ἡ, τό with insertion of -υ- (= Sanskrit Particle u), e.g. ταῦτα from τα-υ-τα: Doric dialect genitive singular…