Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
tăgădui
←
Hungarian
tagadni
(borrowed)
→
Romanian
tăgăduială
(suffix)
→
Romanian
tăgadă
(back-formation)
→
Romanian
tăgăduire
(suffix)