aid is on the Academic Word List.

Pronunciation

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Singular
aid

Plural
aids

  1. (uncountable) Aid is the help that is given to people, usually by a government or institution.
    After the flood the UN sent $500 million of aid in the form of food, water, tents, and medical supplies.
  2. (countable) An aid is a person or thing that helps you do an activity.
    The president's aid spoke to the newspapers today.
    I can't see, but I have a number of aids, such as a cane, a dog, and a talking computer, that make my life easier.
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Plain form
aid

Third-person singular
aids

Past tense
aided

Past participle
aided

Present participle
aiding

  1. If you aid someone, you help them.