assistance (noun) assistance: help
Sinonime: behind closed doors, behind someone's back, by stealth, clandestinely, confidentially, covertly, furtively, hush-hush, in camera, in confidence, in holes and corners, in secret, in strict confidence, insidiously, intimately, o, obscurely, on the QT
Antonime: hindrance,
hurt,
injury,
stop, stoppage