IPA: /ˈboʊniər/
KK: /ˈboʊniər/
Having more bones or being thinner than usual; often used to describe someone or something that looks very thin or has prominent bones.
After the illness, he looked even bonier than before.
Comparative: bonier
Superlative: bonyest
The word 'bonier' is derived from 'bony' (from Old French *bony*, meaning full of bones) and the comparative suffix '-er' (meaning more). Thus, 'bonier' means more bony or having more bones than something else.
Think of 'bony' meaning full of bones, and the '-er' indicates a comparison, so 'bonier' means having more bones.