LogeionPerseus analysis of ἄχος:
ἄχος (pain, distress): neut nom/voc/acc sg
LSJ entry
ἄχος 1
ἄχος [
ᾰ], εος, τό, A. pain, distress, in Hom. always of mind, ἄχος αἰνόν, ἄλαστον, ἄτλητον, ὀξύ, Il. 4.169,
al.; ἄχεος νεφέλη μέλαινα 17.591;
ἄχεʼ ἄκριτα 3.412;
τὸν δʼ εἷλεν ἄχος κραδίαν B. 10.85;
also of physical ills, Pi. P. 3.50 (pl.); δειμάτων ἄχη A. Ch. 586 (lyr.); ἀκοῦ δʼ ἄχος, with a play on the words, S. Tr. 1035;
οὐράνιʼ ἄχη A. Pers. 573 (lyr.); ἐμοὶ δʼ ἄχεʼ, ἄχεα κατέλιπε Ar. Ra. 1353 (paratrag.), cf. 1531 (hex.).— Rare in Prose, ἡ παῖς ἀπήγξατο ὑπὸ ἄχεος Hdt. 2.131;
ἄ. αὐτὸν ἔλαβεν X. Cyr. 5.5.6,
cf. Plu. Cor. 20.