a large spoon used for eating soup or as a unit of measurement in cooking (tablespoon)

a tool used to operate a lock

the hole in a lock where a key is inserted

The idiomatic concept that different situations, problems, or individuals require unique, tailored solutions.

a spoonful

a key designed to open many different locks, including skeleton keys and passkeys

public key (used in encryption)

serving chopsticks and spoons used in communal dining to promote hygiene

A long-handled metal spoon used in chemistry experiments to hold small amounts of material for burning or deflagration.

private key (in encryption)

to make a key