Strong's 5176 (τρώγω)

eat

or perhaps rather of a base of G5167 (τρυγών) and G5149 (τρίζω) through the idea of a craunching sound; to gnaw or chew, i.e. (generally) to eat

probably strengthened from a collateral form of the base of G5134 (τραῦμα) and G5147 (τρίβος) through the idea of corrosion or wear;