Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
singan
←
Proto-Germanic
*singwaną
(inherited)
←
Proto-West Germanic
*singwan
(inherited)
←
Proto-Indo-European
*sengʷʰ-
(derived)
→
Low German
singen
(inherited)