Unbidden (adjective)

Not requested or commanded; done or given voluntarily.

Origin:

From the word bid meaning "to request or command" and the prefix un- meaning "not".

Examples:

  1. He arrived unbidden and uninvited.
  2. The memories came unbidden to her mind.
  3. The tears came unbidden to his eyes.
  4. He offered his help unbidden.
  5. The thoughts came unbidden during the meditation.
Some random words: antic, acetic, exploiter