Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
langsum
←
Old English
lang
(affix)
←
Old English
-sum
(affix)
←
Proto-West Germanic
*langasam
(inherited)
→
English
longsome
(inherited)
→
Old English
langsumlice
(affix)
→
Old English
langsumnes
(affix)
→
Scots
langsome
(inherited)