Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-West Germanic
*tą̄h(ī)
→
English
tough
(inherited)
→
German
zäh
(inherited)
→
Dutch
taai
(inherited)
→
Saterland Frisian
toai
(inherited)