Origin of concussfrom Classical Latin concussus, past participle of concutere: see concussion
transitive verbcon·cussed, con·cuss·ing, con·cuss·es
Origin of concussLatin concutere concuss- to strike together com- com- quatere to strike ; see kwēt- in Indo-European roots.
(third-person singular simple present concusses, present participle concussing, simple past and past participle concussed)
From Latin concussus, the perfect passive participle of concutiō (“shake violently”), from con- + quatiō (“shake, hit”).