Apparently a middle voice of ephistemi (with nous implied); to put the mind upon, i.e. Comprehend, or be acquainted with -- know, understand.

see GREEK ephistemi

see GREEK nous

ἐπίσταμαι (epistamai) − 2 Occurrences

ἐπιστάμενος (epistamenos) − 4 Occurrences

ἐπίστανται (epistantai) − 2 Occurrences

ἐπίστασθε (epistasthe) − 5 Occurrences

ἐπίσταται (epistatai) − 1 Occurrence