noun
custody
KUS-tuh-dee/ˈkʌstədi/
Control over someone or something entrusted to one's keeping.
The property officer places the sealed valuables in police custody inside a locked cabinet.

Etymology
Latin custodia expressed guarding and safekeeping. The selected legal sense preserves that protective idea: custody is responsibility for keeping a person or thing in one's care.
In context
cannot agree on who will have legal custody of their children and take responsibility for the decisions involving them
More examples
- Police keep the suspect in custody overnight.
- The museum has custody of the documents until their owner returns.
- She seeks full custody of her two children.
Forms
custody
custodial adjective — Relating to legal care or confinement.
custodian noun — A person responsible for protecting or managing something.