Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Silesian
tyngi
←
Czech
tuhý
(cognate)
←
Polish
tęgi
(cognate)
←
Proto-Slavic
*tǫgъ
(inherited)