Here's my breakdown: inter - between cess - go sion - nominalizer (make it a noun) related words are intersection, intervention, recession (a going back) Here's what an online etymology site says :...
An example of a prefix is: re-recharge, reboot, reanimated, refuse, refer, recollect and referendum.An example of a suffix is: -ingshooting, hitting, marching, letting, collecting, referring,...