Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
hallur
←
Proto-Germanic
*halþaz
(inherited)
←
Proto-Germanic
*halluz
(inherited)
←
Old Norse
hallr
(inherited)
←
Old Norse
hallr
(inherited)
→
Westrobothnian
hall
(cognate)
→
Alemannic German
hale
(cognate)