He claims to be loyal, but he stabs in the back anyone who threatens his position.

I bumped into my back-friend at the café and we spent the afternoon catching up.

The coach insisted that the center-back focus on positioning during set pieces.

After months of struggle, we've finally seen the back of the troublesome project.

When times got tough, my back-friends showed up with warm meals and quiet support.

After years of turmoil, the city council felt a sense of relief, seeing the back of the corrupt mayor as he boarded the helicopter.

Every morning, he stands on the platform and sees the back of his son disappear into the crowd as the train pulls away.

As the train pulled away, I saw the back of my childhood home for the last time.

The curator back-annotates archival records when new provenance information emerges.

The design team performed back-annotation to incorporate measured parasitic delays into the logical circuit model for more accurate timing simulations.