Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
veikur
←
Proto-Germanic
*waikwaz
(derived)
←
Old Norse
veikr
(derived)
→
English
weak
(cognate)
→
Icelandic
geðveikur
(compound)
→
Icelandic
veikla
(mention)
→
Icelandic
veikleiki
(suffix)
→
Luxembourgish
weech
(cognate)