IPA: /fɪˈleɪtə/
KK: /fɪˈleɪtər/
A person who cuts fish or meat into fillets, which are thin slices of the flesh.
The filleter prepared the fish by removing the bones and cutting it into fillets.
Filleter is derived from the Old French word 'fileter', meaning to thread or to spin. The word is related to the act of preparing fish by removing the bones, akin to threading the flesh from the bones.
Imagine the process of 'threading' ('fileter') the flesh of the fish to remove the bones — that's how you remember that 'filleter' means to prepare fish by filleting.