sandhi contraction
Analysis. no + iti + eva + ettha; a colloquial contraction expressing emphatic negation: 'not indeed, in this very place/case'. The particle iti marks quotation or assertion; eva intensifies; ettha grounds the negation locally. Common in dialogue to dismiss a claim sharply.
Etymology. no (< ne + u, 'not') + iti (from √i 'go', here 'saying', 'asserting') + eva (< *swa 'self', intensifying particle, cognate to English 'self', Sanskrit sva) + ettha (< *etati, locative of demonstrative, cognate to English 'that'). The sequence fuses into a single emphatic particle of negation and refusal.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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