amo
/ˈamo/ · A1 · noun · m
maestro
amo, master of the house, is kin to ama de casa, the housewife
Amo is the masculine of ama, an old Hispanic nursery word for wet nurse that grew to mean mistress of a household. From there amo came to mean the owner of slaves, animals or a business. Separately, amo is also I love, from amar.