Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Lushootseed
-dup
→
Lushootseed
ʔix̌ʷdupəd
(affix)
→
Lushootseed
ʔix̌ʷduptəd
(affix)