Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
weorcsum
←
Old English
weorc
(suffix)
←
Old English
sum
(suffix)
→
English
irksome
(inherited)
→
English
worksome
(cognate)