Having blades that curve backwards, as respects the direction of rotation, so that they draw through the water without accumulating weeds.
Lacking weeds.
Consisting of weeds.
Characteristic of a plant that grows rapidly and spreads invasively, and which grows opportunistically in cracks of sidewalks and disturbed areas.
Abounding with weeds.
Of, relating to or resembling weeds.
Small and weak.
Lacking power or effectiveness.