Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
mún
←
Proto-Indo-European
[[*mew-]], [[*mū-]]
(inherited)
←
Latin
mūtō
(cognate)
→
Irish
mún
(inherited)
→
Scottish Gaelic
mùn
(inherited)
→
Manx
moon
(inherited)