Custody (kst-d), n.
Etymology: [L. custodia, fr. custos guard; prob. akin to Gr. hide. Seee Hide to cover.]
1. A keeping or guarding; care, watch, inspection, for keeping, preservation, or security. A fleet of thirty ships for the custody of the narrow seas. Bacon.
2. Judicial or penal safe-keeping. Jailer, take him to thy custody. Shak.
3. State of being guarded and watched to prevent escape; restraint of liberty; confinement; imprisonment. What pease will be given To us enslaved, but custody severe, And stripes and arbitrary punishment Milton.
Shades of meaning
Fernald has no entry of its own for custody; he lists it under fetter.
He lists it without comment; the entries above explain its neighbors.