Where does “sama sekali” come from?

sama sekali (Indonesian) comes from Indonesian sekali, from Malay sekali, from Malay se-, from Old Malay sa-, from Proto-Malayic sA-, from Proto-Malayic əsa, from Proto-Malayo-Chamic əsa, from Proto-Malayo-Sumbawan əsa.

Ancestry of “sama sekali”, step by step

sama sekali traces back through two separate lines of ancestry.

via Indonesian sekali

StepLanguageWordMeaning
1Indonesiansekalionce; very
2Malaysekalionce; very
3Malayse-one; used to form the comparative of adjectives;...
4Old Malaysa-
5Proto-MalayicsA-one
6Proto-Malayicəsa
7Proto-Malayo-Chamicəsa
8Proto-Malayo-Sumbawanəsa
9Proto-Malayo-Polynesianəsaone
10Proto-Austronesian*əsa
11Proto-Oceanic*isa

via Indonesian sama

StepLanguageWordMeaning
1Indonesiansamasame; equal
2Malaysamasame; equal; with
3Sanskritसमsame, equal, alike; equivalent to, like,...
4Proto-Indo-IraniansamHássame, equal
5Proto-Indo-EuropeansomHóssame, alike
6Proto-Indo-Europeansem-together, one
Every word from Proto-Oceanic *isa