[1] Likewise or similarly in other lexica. The headword is aorist active infinitive of a(marta/nw (cf. eta 286 and see generally LSJ s.v.). Hesychius s.v. reveals that it is extracted here from Sophocles, Philoctetes 231. On the relationship of the headword and its gloss, see the note on alpha 3591 (and Dyer in the bibliography there).
[2] Likewise in syntactical lexica.