Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
siok
←
Old English
sēoc
(cognate)
←
Proto-Germanic
*seukaz
(inherited)
←
Old High German
sioh
(cognate)
←
Old Norse
sjúkr
(cognate)