Greek word
trṓgō
τρώγω
What it means
or perhaps rather of a base of trygṓn and trízō through the idea of a craunching sound
or perhaps rather of a base of trygṓn (τρυγών) and trízō (τρίζω) through the idea of a craunching sound; to gnaw or chew, i.e. (generally) to eat
Where it comes from
probably strengthened from a collateral form of the base of traûma (τραῦμα) and tríbos (τρίβος) through the idea of corrosion or wear