I.any one who, anything which, i. e. whosoever, whichsoever, differing from ὅς, as Lat. quisquis, from qui, Hom., etc.; ὅντινα κιχείη whomsoever he caught, Il.; ὅτις κ ἐπίορκον ὀμόσσῃ whoso forswears himself, id=Il., etc.: —ἔστιν ὅστις, Lat. est qui, often with a negat., οὐκ ἔστιν ὅτῳ μείζονα μοῖραν νείμαιμ᾽ there is no one to whom I would give more, Aesch., etc.: —οὐδὲν ὅ τι οὐ everything, Hdt.
III.in indirect questions, ξεῖνος ὅδ᾽, οὐκ οἶδ᾽ ὅστις Od.:—in dialogue, when the person questioned repeats the question asked by τίς, as οὗτος τί ποιεῖς; Answ. ὅ τι ποιῶ; [you ask] what I'm doing? Ar.
2.from what cause, id=Soph., Eur.