mōmīekõks instrumental singular of mōmīez...
mōmīeztõ mōmēḑi dative (datīv) mōmīen mōmīedõn instrumental (instrumentāl) mōmīekõks mōmīedkõks illative (illatīv) mōmīezõ mōmēži inessive (inesīv) mōmīesõ...