The headword marmare/hn is feminine accusative singular of the epic/poetic adjective marma/reos. See further, next note.
[1] Likewise or similarly in other lexica (see the references at Photius mu111 Theodoridis), and cf. also the scholia to Homer, Iliad 3.126, where the headword occurs in the vulgate tradition (as an alternative to porfure/hn). See also Iliad 14.273, 17.594 and 18.480.
[2] From the scholia to Aristophanes, Clouds 286, where this phrase (with the headword adjective in the feminine dative plural) occurs, in a choral lyric passage (web address 1).
[3] Again from the Clouds scholia (see n. 2), and similarly elsewhere.