ἅτʼ (hat)
ἅτʼ is an Ancient Greek form of ὅστε, meaning “who, which”. It is the nominative singular feminine pronoun.
It can also be a form of ἄατος, “insatiable”.
Found 45 times in the Ancient Greek texts on Socratos.
Where it is used
Diogenes Laertius, Vitae philosophorum 7.1.31: … ὶ περὶ μὲν τῆς τελευτῆς ταῦτα. Φησὶ δὲ Δημήτριος ὁ Μάγνης ἐν τοῖς Ὁμωνύμοις τὸν πατέρα αὐτοῦ Μνασέαν πολλάκις ἅτʼ ἔμπορον Ἀθήναζε παραγίνεσθαι καὶ πολλὰ τῶν Σωκρατικῶν βιβλίων ἀποφέρειν ἔτι παιδὶ ὄντι τῷ Ζήνωνι·
Sophocles, Ichneutae 135: τ[ίς ἦν; τί σιγ]ᾶτʼ, ὦ πρ[ὸ τοῦ λαλίστ]ατοι;
Aeschylus, Eumenides 921: ᾇτʼ ἐγὼ κατεύχομαι
All forms of ὅστε (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.