Slipped

The pencil slipped from the desk onto the floor.

The sun slipped below the horizon, leaving a colorful sky behind.

The spy slipped the secret code into the message, without anyone realizing it.

The secret plan was slipped into a confidential memo, without anyone noticing.

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 spy slipped past the guard and entered the building undetected.

The quality of the product slipped after the company outsourced production.