overload

[1]	weigh down , burden , overburden , load (up) , overtax , saddle with , tax , strain , impede , handicap , oppress , encumber , cumber , overcharge
[2]	clog
[3]	surcharge , overcharge

[1]	overburden , surcharge , overcharge , overburden , dead weight , oppression , handicap , tax , load , encumbrance , impediment , hindrance