IPA: /sɪnˈdæktɪli/
KK: /sɪnˈdæktɪli/
A condition where two or more fingers or toes are joined together, often present at birth.
The baby was born with syndactyly, having two of her toes fused together.
Syndactyly → It is formed from "syn-" (meaning together) and "daktulos" (meaning finger). The word describes a condition where fingers are fused together, hence they are 'together' in structure.
Think of fingers being 'together' ('syn-') — that's why syndactyly refers to the condition of fused fingers.