Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Serbo-Croatian
težak
←
Proto-Slavic
*tęžьkъ
(inherited)
→
Westrobothnian
tong
(cognate)
→
Old Norse
þungr
(cognate)