Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
schwéier
←
Danish
svær
(cognate)
←
German
schwer
(cognate)
←
English
sweer
(cognate)
←
West Frisian
swier
(cognate)
←
Proto-Germanic
*swēraz
(derived)
←
Old High German
swār
(derived)
←
Dutch
zwaar
(cognate)
→
Luxembourgish
liicht
(link)