Often used to describe unpleasant odors.
El hediondo olor de la basura era insoportable en la calle.
The foul-smelling odor of the garbage was unbearable on the street.
El hediondo olor provenía de la basura acumulada en la esquina de la calle.
The foul-smelling odor came from the trash piled up in the corner of the street.