interference

[1]	meddling , intervention , intrusion , intruding , intervention , interceding , intercession
[2]	hindrance , hindrance , hinderance , impediment , block , obstruction , encumbrance , impedance , difficulty , snag , hitch , handicap , set-back , frustration , inhibition , conflict , opposition
[3]	noise , disturbance
[4]	hindrance , hinderance , hitch , preventive , preventative , encumbrance , incumbrance