Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
lehký
←
Proto-Indo-European
*h₁lengʷʰ-
(derived)
←
Proto-Slavic
*lьgъkъ
(inherited)
→
Czech
lehkomyslný
(compound)
→
Czech
lehkost
(suffix)
→
Czech
nelehký
(prefix)
→
Czech
lehkověrný
(affix)
→
Silesian
leki
(cognate)