Superlative form of bony; most skeletal, thin, or containing the most bones.
Formed from the adjective 'bony' plus the superlative suffix -est, following the same y-dropping rule as 'bonier.'
Superlatives like 'boniest' mark the edge of a scale—they're not just comparisons but claims of extremity. Interesting that we rarely hear this word because 'most bony' sounds awkward; superlatives work best with short adjectives.
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