Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
seihll
←
Irish
saol
(cognate)
←
Scottish Gaelic
saoghal
(cognate)
←
Latin
saeculum
(derived)
←
Old Irish
saegul
(inherited)