Correct spelling, explanation: this word comes from the Old Norse language, in which it used to mean as far as. The form that we know today (namely until) appeared for the first time in Middle English. Nowadays it is a commonly used preposition both in writing and speaking. It is worth noticing that until has a single -l at the end.

Definition of until
1. preposition/conjunction – up to a certain time,
I was awake until three o’clock so today I feel exhausted.
2. preposition/conjunction – as far as,
Do not leave the bus until you see a big, red building.

Collocations and phrases with until
Some typical expressions with the word until include:
1. until all hours – very late,
I don’t see him much as he has been working until all hours recently.
2. wait until – to suggest that something surprising will happen,
Wait until you see her in a wedding dress.
3. not until – not before the specified time,
Don’t press that red button until I tell you.

Incorrect spelling, explanation: there are two similar prepositions in English – both in spelling and meaning – till and until. The former one is spelled with a double -l while the latter one with a single -l. Users of English tend to mix those two and as a result, frequent spelling mistake is untill. This form, however, is wrong and the only correct spelling is until.

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling, explanation: a less formal way of saying until.

Incorrect spelling

Incorrect spelling

Incorrect spelling