"special ordinance or regulation promulgated by authority," early 14c., originally ecclesiastical, secular use is by late 14c., from Old French decre, variant of decret (12c., Modern French décret), from Latin decretum, neuter of decretus, past participle of decernere "to decree, decide, pronounce a decision," from de (see de-) + cernere "to separate" (from PIE root *krei- "to sieve," thus "discriminate, distinguish").
"to order or promulgate with authority," late 14c., decreen, from decree (n.). Related: Decreed; decreeing.
"broken down in health, weakened, especially by age," mid-15c., from Old French decrepit (15c., Modern French décrépit), from Latin decrepitus "very old, infirm" (of old men and old animals), from de "down" (see de-) + *crepitus, past participle of crepare "to crack, break" (see raven). The literal sense of the Latin word is uncertain. Related: Decrepitly.
"act of snapping or bursting with a crackling noise when heated," 1660s, from Latin decrepitationem (nominative decrepitatio), from de- + crepitatus, past participle of crepitare "to crack, break" (see raven).
in music, "a gradual diminution in force, a passing from loud to soft," 1806, from Italian decrescendo, present participle of decrescere, from Latin decrescere "to grow less, diminish," from de "away from" (see de-) + crescere "to grow" (from PIE root *ker- (2) "to grow"). Also as an adjective and adverb.
"pertaining to or following a decree," 1630s, from Latin decretorius, from decretum (see decree (n.)). Related: Decretorial (1580s).