Welsh
Etymology
Literally, “archer's peas”.
Noun
pys saethwr (plural, singular pysen saethwr f)
- Japanese knotweed (Reynoutria japonica)
- Synonyms: clymog Japan, llysiau'r cythraul
Mutation
Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.