Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
trilla
←
Old English
þyrel
(cognate)
←
English
drill
(cognate)
←
Proto-Germanic
*þriljaną
(derived)
←
Galician
trilla
(back-formation)
←
Galician
trilla
(back-formation)
→
Galician
trilla
(back-formation)
→
Galician
trilla
(back-formation)