Arising from a momentary impulse.
Sudden, without warning.
Controlled and directed internally; self-active; spontaneous movement characteristic of living things.
Random.
Done by one's own free choice, or without planning.
Produced without being planted or without human cultivation or labor.
Self-generated; happening without any apparent external cause.
Proceeding from natural feeling or native tendency without external or conscious constraint.
Flying or soaring as if on wings.
Swift.
having wings of a specified kind
having the specified number of wings
Having wings.