unlicensed; without a license
Used for driving, operating a business, or any activity requiring official permission. Often appears in compounds like 無免許運転 (driving without a license).
無免許でタクシーを営業していた。
He was operating a taxi without a license.
無免許運転で逮捕された。
He was arrested for driving without a license.
He was arrested for driving a car without a license.
It came to light that an unlicensed doctor had been practicing.