An exclamation expressing surprise, disgust, or discomfort, with dialectal or archaic usage.
Likely imitative or expressive in origin, possibly from Germanic or Old English roots, with the repeated 'ch' sound mimicking a sharp reaction or involuntary utterance.
Interjections like 'achech' show how languages preserve raw human emotion—these sounds haven't changed much since medieval times because they're tied to our instinctive physical reactions rather than learned vocabulary.
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