aid
/eɪd/
Help; assistance; succor, relief.
He came to my aid when I was foundering.
A helper; an assistant.
Something which helps; a material source of help.
Slimming aids include dietary supplements and appetite suppressants.
An historical subsidy granted to the crown by Parliament for an extraordinary purpose, such as a war effort.
An exchequer loan.
A pecuniary tribute paid by a vassal to his feudal lord on special occasions.
An aide-de-camp, so called by abbreviation.
The incompetent general's brilliant aid often made priceless suggestions.