Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
obtuza
←
English
obtuse
(borrowed)
←
Spanish
obtuso
(borrowed)
←
French
obtus
(borrowed)
←
Italian
ottuso
(borrowed)
←
Latin
obtūsus
(derived)
←
Latin
obtundere
(mention)
←
Latin
obtundō
(mention)