Also see definition of "Gross" in Word Study
Gross
GROSS [isbe]
GROSS - gros (`araphel): Used twice with "darkness" in Isa 60:2; Jer 13:16. In the New Testament the verb pachuno, "to make fat," is applied twice to "making gross" the heart (Mt 13:15; Acts 28:27).See GREASE.
Also see definition of "Gross" in Word Study
