in.

To enter a place by force or illicit means.

To use new machinery at less than full speed, preventing damage.

An outdoor cinema where movies are projected onto a large screen and patrons watch from inside their vehicles, listening either by a speaker or a designated radio frequency.

Someone who walks in (to a place, etc).

To announce or record one's own arrival at a hotel, airport etc.

A household employee or domestic partner who lives on the premises of the employer or partner.

To substitute for; to replace

The act of something collapsing or caving in.

To stock (something) by buying inventory from a third party.

To attend a class, educational presentation, meeting, etc. for one time, as a visitor.

To confine.

To undergo a weigh-in.

A situation in which a business has adopted a certain standard or product from a specific manufacturer and integrated it into their process, thus making it very costly to change to a different standard or supplier.

To sign one's name on a list when entering a place, to indicate one's arrival.

Something or someone that causes discomfort, frustration, or annoyance.

One who casually drops in (visits unannounced or without appointment).

Onto or into someone's face.

A period spent lying in bed for longer than usual after one has woken up.

A temporary replacement for another, especially at a job.

A person unwilling to participate in activities; a curmudgeon or party pooper.