| Answer | Crossword Clue |
|---|---|
| unidirectional | Moving or operating in a single direction |
| unidirectional | involving, functioning, moving, or responsive in a single direction |
| streams | A mass of people or things moving continuously in the same direction |
| downstream | Situated or moving in the direction in which a stream or river flows |
| straightest | Extending or moving uniformly in one direction only; without a curve or bend |
| straighter | Extending or moving uniformly in one direction only; without a curve or bend |
| upstream | Moving or situated in the opposite direction from that in which a stream or river flows; nearer to the source |
| currents | A body of water or air moving in a definite direction, esp. through a surrounding body of water or air in which there is less movement |
