hapero

Noun

 * 1) brittlegill, russula mushroom of the genus

Adjective

 * 1) brittle apt to break or crumble when bending

Usage notes
Whereas can be used of almost anything brittle, the term  is used especially of organic materials that have become brittle over time, such as old newspapers or textiles. Often it indicates extreme weakness, i.e. the material in question may break out of a mere touch. It's hardly ever used figuratively, e.g. a mind or an old person may be, but not.