Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
глубо́кий
→
Old English
cleofan
(cognate)
→
Russian
глубоководный
(affix)
→
Russian
неглубокий
(affix)