vetta

vettā the knower; BG 11.38
kṛṣṇa-tattva-vettā a knower of the science of Kṛṣṇa; CC Madhya 8.128
vettā cognizant; CC Madhya 10.111
vettā the knower; CC Antya 7.21
rasa-vettā one who understands transcendental mellows; CC Antya 7.36