Slipped

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.

The papers slipped out of the folder and scattered across the desk.

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

The water level slipped as the drought continued.

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

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