Is it ensure, insure, or assure?
early 13c., "rough, jagged" (figurative); 1570s, of landscape, "rough, rugged, stumpy;" 1610s, of persons, "gaunt and wasted, lean, thin, bony;" see scrag + -y (2), and cf. scroggy, scraggly. In Scottish, scranky. Related: Scragginess.
Gaunt and wasted; lean; bony: snapshot of a scraggy Sindona as an apparent captive (1611+)