1. galla — de Vaan
galla 'gall, bile' < PGm. *gallon-. Etymology uncertain. The nom.sg. must be from *felJ, since it did not change to *fol (Cowgili 1978: 38). *Fell was analogically introduced for the original nom.sg. (*jfe/o?), and then -11 was simplified to -I The gen.sg. 'fellis might reflect *fel-n-os. But intervocalic -//- can also stem from *-Λν-. Alternatively,^/ and its paradigm may have been analogically influenced by mel, … — [de Vaan, s.v. galla, p. 223]