https://www.biblestudytools.com/dictionary/master/
MASTER. mas'-ter ('adhon, ba`al, rabbi; despotes, didaskalos, kurios, rhabbi): "Master," when the translation of 'adhon, "ruler," "lord" (Sir), often translated "lord," denotes generally the owner or master of a servant or slave (Ge 24:9, etc.; 39:2, etc.; Ex 21:4, etc.; De 23:15 bis; 2Sa 9:9,10 twice; Pr 30:10); elsewhere it is rather "lord" or "ruler" (often king, e.g. 1 Samuel 24:6,8; 26:16 ); in the plural 'adhonim, it is, as the rule, used only of God (but see Genesis 19:2,18 ...