This root form (lemma) is used in 2 different forms in the NT: Καθηγηταί (NMP), καθηγητὴς (NMS).
It is glossed in 3 different ways: ‘the instructor’, ‘instructor’, ‘instructors’.
OET MAT 23:8 Greek word=καθηγητὴς (kathaʸgaʸtaʸs) Morphology=NMS English gloss=‘instructor’ SR GNT MAT 23:8 word 12
OET MAT 23:10 Greek word=Καθηγηταί (Kathaʸgaʸtai) Morphology=NMP English gloss=‘instructors’ SR GNT MAT 23:10 word 3
OET MAT 23:10 Greek word=καθηγητὴς (kathaʸgaʸtaʸs) Morphology=NMS English gloss=‘the instructor’ SR GNT MAT 23:10 word 5