The headword is present participle, masculine nominative singular, of the epic/poetic verb ligai/nw (only in present and imperfect); see generally Homer, Iliad 11.685 (web address 1). Perhaps quoted here from Apollonius Rhodius, Argonautica 1.740 (web address 2).
[1] Same or similar glossing in the Synagoge and elsewhere: see the references at Photius lambda298 Theodoridis.
[2] cf. Hesychius lambda957, with me/lpwn, h(dews u(mnw=n; and more generally Hesychius lambda955 and lambda956.