distribute; spread; scatter (like seeds)
The health ministry used newspaper, radio, and television ads to disseminate information about how to protect oneself from the new epidemic.
dis (in every direction)#semen seminis (seed) (Latin)
dis+sem+i+n+ate: dis (this) sem (semester) I n (not) ate because I distributed all my food among poor people. So it means to distribute or spread. dis + seminate seminate could be taken as seminar, so for a seminar people gather at a place. Hence dis-seminar could be understood as the scattering of people.