Where does “dosis” come from?

dosis (Latin) comes from Ancient Greek δόσις, from Ancient Greek δίδωμι, from Proto-Indo-European dédeh₃ti, from Proto-Indo-European deh₃- — to give.

dosis (Latin): dose

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	δόσις	giving, a gift; license, permission; portion
2	Ancient Greek	δίδωμι	I give, present, offer; I grant, allow, permit;...
3	Proto-Indo-European	dédeh₃ti	to be giving
4	Proto-Indo-European	deh₃-	to give

dosis — Etymology, Origin & Word History | Etymology Explorer