Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle English
þes
←
Old English
þēs
(inherited)
←
Old English
þēos
(mention)
←
Old English
þis
(mention)
→
English
these
(inherited)
→
Middle English
þis
(alter)
→
Middle English
þis
(alter)