What it means
A supremely versatile Hindi word meaning good, okay, really, or oh I see, depending on how you say it. Flat achha means alright then. Rising achha means oh really, tell me more. Drawn out achha means I do not believe a single word you just said. It is the Swiss Army knife of conversational fillers across Indian English and Hinglish.
Usage examples
"Achha, so you are telling me you studied all night but somehow slept through the exam? Achha achha, very interesting story, let me just check your Netflix history real quick."
Where it comes from
From the Hindi adjective acchā (good, fine, correct), pronounced [ət͡ʃʰa], attested in standard Hindi and Urdu since at least the eighteenth century in the spoken vernacular of Delhi, Lucknow and the wider Hindi belt of north India. The word entered the everyday English of the Indian subcontinent through the bilingual code-switching of urban professionals in Mumbai, Bangalore and Delhi of the twentieth century, and the rich tonal range of the spoken delivery (flat for acknowledgment, rising for genuine surprise, drawn out for sarcastic disbelief, repeated for amused doubt) has become one of the most expressive features of Indian English among the diaspora of London, Toronto and Silicon Valley as well.
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