Superlative form of 'bitty,' meaning the most small, fragmented, or broken into tiny pieces.
From 'bitty' (consisting of small disconnected pieces), plus the superlative suffix '-est,' marking the extreme degree of the quality.
The suffix '-est' for superlatives (smallest, biggest, bittiest) comes directly from Germanic languages and is one of the oldest grammatical features in English, unchanged for over a thousand years.
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