| Answer | Crossword Clue |
|---|---|
| plainest | Without a pattern; in only one color |
| monochrome | of one colour only / a painting or drawing in a single color |
| monochromes | A photograph or picture developed or executed in black and white or in varying tones of only one color |
| 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 |
| unilateral | (of an action or decision) Performed by or affecting only one person, group, or country involved in a particular situation, without the agreement of another or the others |
