Slipped

The employee slipped up and sent the wrong email to the client.

The company's profits slipped due to the economic downturn.

The water level slipped as the drought continued.

The market share slipped as the competition grew stronger.

The confidential information slipped into the wrong hands, leading to a major security breach.

He slipped a piece of paper into the envelope and sealed it shut.

The key slipped out of the lock and onto the ground.

The important document slipped into the wrong hands, causing a security breach.

His physical condition slipped after he stopped exercising.