(of body tissue or an organ) wasted away or rudimentary

atrophied muscles

in some beetles, the hindwings are atrophied

having lost effectiveness or vigour due to underuse or neglect

the atrophied global economy contains numerous areas of chronic weakness

(of body tissue or an organ) waste away, especially as a result of the degeneration of cells, or become vestigial during evolution

the calf muscles will atrophy

gradually decline in effectiveness or vigour due to underuse or neglect

the imagination can atrophy from lack of use