Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Alemannic German
sächs
←
German
sechs
(cognate)
←
English
six
(cognate)
←
Proto-Germanic
*sehs
(inherited)
←
Middle High German
sehs
(inherited)
←
Old High German
sehs
(inherited)
←
Gothic
𐍃𐌰𐌹𐌷𐍃
(cognate)
←
Proto-Indo-European
*swéḱs
(inherited)
←
Icelandic
sex
(cognate)
←
Dutch
zes
(cognate)