Latin fossō

→ Esperanto fosi (borrowed)

→ French fossé (inherited)

→ Middle French fossé (inherited)

→ Italian fossato (inherited)

→ Latin fossatum (mention)

→ Latin fossatus (mention)

→ Latin fossans (mention)

→ Latin fossaturus (mention)

→ Latin fossandus (mention)

→ Old Spanish fonsado (mention)

→ Gallo fossé (inherited)