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.

He slipped the key into the lock and turned it quietly.

He slipped and used a curse word in front of his grandmother.

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

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

The light slipped out of the room as he turned off the lamp.

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