Same entry, according to Adler, in the Ambrosian Lexicon; and Hesychius has the plural a)go/mfwta glossed with a)na/rmosta ("not-fixed"). Otherwise, this adjective is attested only -- and in the singular, as here -- in [John Chrysostom], On Martha, Mary and Lazarus (PG 10.757e), where it is used of a boat.
For go/mfoi see gamma 376.