disuse

n a decrease in size of an organ caused by disease or disuse n any weakening or degeneration (especially through lack of use) v undergo atrophy

a decrease in size of an organ caused by disease or disuse n

a state of inactivity or disuse

A letter (/, /) of the Greek alphabet, which early fell into disuse.

Neglect of disuse of familiarity, or familiar acquaintance.