Where does “tambahkan” come from?

tambahkan (Indonesian) comes from Indonesian -kan, from Malay -kan, from Proto-Malayic *-kən.

Ancestry of “tambahkan”, step by step

StepLanguageWordMeaning
1Indonesian-kanUsed to indicate transitive imperative verbs;...
2Malay-kanUsed to indicate transitive imperative verbs;...
3Proto-Malayic*-kən—
Every word from Proto-Malayic *-kən →Every word from Indonesian -kan →Every word from Malay -kan →