אֵם
From LSJ
Μισθὸς διδάσκει γράμματ', οὐ διδάσκαλος → Pretium docet te, non praeceptor, litteras → Der Lehrer lehrt das Lesen nicht, es ist der Lohn
English (Strong)
a primitive word; a mother (as the bond of the family); in a wide sense (both literally and figuratively (like אָב): dam, mother, X parting.