ὀρεσκῳ̃ος

From LSJ

ἔνδον γὰρ ἁνὴρ ἄρτι τυγχάνει, κάρα στάζων ἱδρῶτι καὶ χέρας ξιφοκτόνους → yes, the man is now inside, his face and hands that have slaughtered with the sword dripping with sweat

Source

Frisk Etymological English

Grammatical information: adj.
Meaning: housing in the mountains (A 268, ι 155, Hes.Fr. 79, 5).
Other forms: ὀρεσκόος (A., E.).
Origin: IE [Indo-European] [539] *ḱei- lie
Etymology: Compound of ὄρος (s.v.) and κεῖμαι (?) with ο-ablaut (cf. e.g. δορυ-σσόος to σείω); the irregular length (cf. Skt. -śay-á- lying) is prob. metr. conditioned, the yota is analogical after κοῖ-τος a.o. Bechtel Lex. s.v. wants with Fick to write -οι- for -ῳ-; s. Schwyzer 450 n. 4 and 679 n. 4 w. lit. An innovation (after the adj. in -ιος) is ὀρέσκιος surn. of Dionysos (AP), thus ὀρεσκεύω living in the mountains (Nic.).