Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
trome
←
Proto-Celtic
*trummos
(inherited)
←
Welsh
trwm
(cognate)
←
Old Irish
trom
(inherited)
→
Manx
trome-volleeagh
(affix)
→
Manx
cohrome
(prefix)
→
Manx
trimmid
(suffix)