Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
poyll
←
Old English
pōl
(derived)
←
English
pool
(cognate)
←
Middle Irish
poll
(inherited)
→
Manx
Lerphoyll
(mention)