What word or phrase does your mother always say?
early 15c., "pertaining to sclerosis," from medical Latin scleroticus, from Greek skleroun (see sclerosis). Figurative meaning "unchanging, rigid" is from 1961.
sclerotic scle·rot·ic (sklə-rŏt'ĭk)adj.
Affected or marked by sclerosis.
Of or relating to the sclera of the eye.