Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Sylheti
ꠌꠂꠔ
←
Assamese
চ’ত
(cognate)
←
Bengali
চৈত্র
(cognate)
←
Sanskrit
चैत्र
(derived)
→
Assamese
চ’ত
(cognate)