fiber

a slender and greatly elongated substance capable of being spun into yarn

coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis

any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)

the inherent complex of attributes that determines a persons moral and ethical actions and reactions; "education has for its object the formation of character"- Herbert Spencer

a leatherlike material made by compressing layers of paper or cloth