Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
ríam
←
Old Irish
rïam
(inherited)
→
Irish
roimhe
(mention)
→
Irish
riamh
(inherited)
→
Scottish Gaelic
riamh
(inherited)
→
Manx
rieau
(inherited)