Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
eunuchry
←
English
eunuch
(suffix)
←
English
ry
(suffix)
←
Proto-Indo-European
*seǵʰ-
(root)