Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Armenian
ութսուն
←
Proto-Indo-European
*oḱtódḱomt
(inherited)
→
Ancient Greek
ὀγδοήκοντα
(cognate)
→
Armenian
ութսուն
(inherited)
→
Old Armenian
ութսներորդ
(suffix)