Disturbance
Middle English: from Old French destourbance, from destourber (see disturb).
wiktionary
From Middle English disturbaunce, from Old French destorbance, destourbance, from destourber(“disturb”), from Latin disturbō. Surface analysis disturb + -ance.
etymonline
disturbance (n.)
late 13c., "mental distress, emotional disorder of the mind, grief," from Old French destorbance (12c., Old North French distorbance), from destourber, from Latin disturbare "throw into disorder," from dis- "completely" (see dis-) + turbare "to disorder, disturb," from turba "turmoil" (see turbid).
Meaning "public disturbance, political agitation" is from c. 1300; that of "violent interruption of peace or unity" is late 14c.; it is the sense in disturbance of the (king's) peace," early 15c.
