The unlawful restraint by one person of the physical liberty of another person is the crime of:

The crime characterized by the unlawful restraint of one person's physical liberty by another is accurately defined as false imprisonment. This legal term refers specifically to the intentional restriction of an individual's freedom of movement without lawful justification. It involves keeping someone confined against their will, whether through physical force, threat, or any means that effectively limits their ability to leave.

False imprisonment does not require that the person be physically moving or transported elsewhere; merely being held against their will in a particular location suffices to establish this offense. This makes it distinct from related terms like kidnapping, which typically involves taking someone against their will with the intent to carry them away, often for ransom or other purposes. Consequently, while kidnapping and abduction might have elements of false imprisonment, they usually involve additional factors or illegal intents.

In summary, the most precise term for the unlawful restraint of physical liberty, focusing solely on the act of confinement without necessarily conveying the additional elements of other related crimes, is false imprisonment.