To make certain something will happen or be done.

To begin the use of a new thing or practice.

Happening or being in the present time. Electricity flowing through wires.

organization providing regular public service of air transport on one. Companies that fly passengers on its planes.

Nearly the same; alike. person or thing similar to another.

Having the ability or authority to make rules.

To try to do something challenging or difficult.

One more, but not this. used to refer to additional person or thing of same type as one. One more (thing).

action of helping or doing work for someone. Ceremonies for religious purposes. To maintain a piece of machinery so it runs well.

come to end.

Used to add new (often different) information.

premises occupied by military commander and commander's staff. Main offices; administrative buildings or centers.

in space separating things. In the space that separates two objects.

officially agreed or accepted as satisfactory. To formally accept something or grant permission.

quantity of food suitable for or served to one person. To help customers find products and making sales.