ἔριν (erin)
ἔριν is an Ancient Greek form of ἔρις, meaning “strife, quarrel”. It is the accusative singular feminine noun.
Found 141 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 6.31.4: ξυνέβη δὲ πρός τε σφᾶς αὐτοὺς ἅμα ἔριν γενέσθαι, ᾧ τις ἕκαστος προσετάχθη, καὶ ἐς τοὺς ἄλλους Ἕλληνας ἐπίδειξιν μᾶλλον εἰκασθῆναι τῆς δυνάμεως καὶ ἐξουσίας ἢ ἐπὶ πολεμίους παρασκευήν.
Hesiod, Theogony 225: Γῆράς τʼ οὐλόμενον, καὶ Ἔριν τέκε καρτερόθυμον.
All forms of ἔρις (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.