until (is both a preposition and a conjunction)
Meaning –up to a point in time or an event.
Example of using it in a sentence: "You have until your appointment to get your homework done”
Spelling Tip – the problem we appear to be having is the single ‘l’ at the end. Some of us are still adding ‘ll.’ I am afraid this is one of the few words you will just have to learn. Write it over and over until you get muscle memory and it looks wrong any other way.
un + t + i + l
Use the word as many times throughout the week as you can. This can be verbally, in your written work or listen out for other people using it.