oscine (adj.)

word-forming element meaning "toward; against; before; near; across; down," also used as an intensive, from Latin ob (prep.) "in the direction of, in front of, before; toward, to, at, upon, about; in the way of; with regard to, because of," from PIE root *epi, also *opi "near, against" (see epi-).

Proto-Indo-European root meaning "to sing."

It forms all or part of: accent; cant (n.1); cantabile; cantata; cantatrice; canticle; canto; cantor; canzone; Carmen; chanson; chant; chanter; chanteuse; chanty; chanticleer; charm; concent; descant; enchant; enchantment; hen; incantation; incentive; oscine; precentor; recant.

It is the hypothetical source of/evidence for its existence is provided by: Greek eikanos "cock," literally "bird who sings (for sunrise);" Latin cantare, canere "to sing;" Old Irish caniaid "sings," Welsh canu "sing;" Old English hana "cock."