The most like straw.
This word makes people think of straw and things that are like straw.
Examples:
The scarecrow has the strawiest hat.
Out of all the animals, the horse has the strawiest hair.
The strawiest thing in the barn is the old broom.
The strawiest part of the party was when the clown fell down.
The strawiest straw in the world is in the farmer's field.
The strawiest thing in the world is the straw itself.