Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
difficult
←
Old English
earfoþe
(cognate)
←
German
Arbeit
(cognate)
←
English
(back-formation)
←
English
difficulty
(mention)
←
Middle English
difficult
(inherited)
←
Middle English
difficultee
(mention)
←
Middle English
earveþ
(cognate)
←
Old French
difficulté
(mention)
←
Latin
difficultas
(mention)
←
Latin
difficul
(mention)
←
Latin
difficilis
(mention)
←
Latin
dis-
(mention)
←
Latin
facilis
(mention)
→
English
difficulty
(affix)
→
English
difficultness
(suffix)
→
English
difficultly
(suffix)
→
English
difficultate
(suffix)
→
English
undifficult
(prefix)
→
English
superdifficult
(prefix)
→
Danish
kompleks
(link)
→
Indonesian
angel
(link)
→
Japanese
難い
(mention)
→
Japanese
難い
(mention)
→
Norwegian Nynorsk
vond
(link)