Slipped

The book slipped from his lap and onto the floor.

He slipped on the wet steps and tumbled down the stairs.

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

She slipped on the rug and nearly fell down the stairs.

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

He slipped the ring from his finger and into the box.

He slipped into his pajamas and crawled into bed.

She slipped on the wet spot in the kitchen and dropped the dishes she was carrying.

The spy slipped past the guard and entered the building undetected.