Where does “bah” come from?

bah (Indonesian) comes from Malay bah, from Sabah Malay bah — used as an intensifier.

Ancestry of “bah”, step by step

bah traces back through two separate lines of ancestry.

via Malay bah

StepLanguageWordMeaning
1Malaybahflood; Alternative form of abah; Alternative form...
2Sabah Malaybahused as an intensifier

via Dutch bah

StepLanguageWordMeaning
1Dutchbahbah, yuck
Every word from Sabah Malay bahEvery word from Malay bah