introduce

To cause (someone) to be acquainted (with someone else).

Let me introduce you to my friends.

His unruly hair was slicked down with water, and as Jessamy introduced him to Miss Brindle his face assumed a cherubic innocence which would immediately have aroused the suspicions of anyone who knew him.

To make (something or someone) known by formal announcement or recommendation.

The senator plans to introduce the bill in the next session.

Let me introduce our guest speaker.

To add (something) to a system, a mixture, or a container.

Various pollutants were introduced into the atmosphere.

To bring (something) into practice.

Wheeled transport was introduced long ago.

First introduced in Letchworth Garden City in 1909, the roundabout[…]proved so popular in Britain that in the 1960s the Transport Research Laboratory developed a miniature version.