Correct spelling, explanation: equal comes from the Latin form aequus, which could be translated as even, equal, or level. Later the word changed its form to aequalis and in the times of Middle Ages, it appeared in English. In modern English, equal is a widely used adjective and noun.

Definition of equal:
1. adjective – the same, e.g. in number, size, amount, etc.,
250 ml of liquid is equal to one full glass, which makes it easy to measure.
2. adjective – skilled or brave enough to do something difficult,
I know he’s a good boy, but are you sure that he’s equal to such a demanding task?
3. noun – something or someone of the same importance, the same,
My husband is still sexually attracted to me, but the most important thing is that he’s my intellectual equal.

Collocations with equal:
A few common collocations with equal are: equal treatment, equal opportunities, and equal partners.
All the students in this school deserve equal treatment so we will not accept any act of bullying.
Our priority goal is to provide equal opportunities for all the kids in this country.
We are supposed to be equal partners in this business, but you don’t tell me everything.

Incorrect spelling, explanation: equal is a short word, but it causes some spelling problems. One of the most common mistakes is to write the word with an -e letter instead of an -a letter, which results in the form equel, which is incorrect. The only correct spelling is with an -e letter at the beginning and at an -a letter at the end of the word equal.

Incorrect spelling