Slipped

The book slipped from his lap and onto the floor.

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

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

She slipped out of her dress and into a swimsuit.

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

He slipped on the soap in the shower and grabbed onto the curtain to prevent falling.

He slipped on the wet tiles and almost crashed into the wall.

I slipped up and forgot to send the important email.

He slipped out of his wet clothes and into a dry towel after a refreshing swim.

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