Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
twp
→
English
twp
(borrowed)
→
Welsh
twped
(suffix)
→
Welsh
twpach
(suffix)
→
Welsh
twpaf
(suffix)