Incorrect spelling, explanation: to create an abstract noun describing a condition we can add the suffix -th to an adjective. This way we transform long into length. The word comes from Old English lengthu. This is why lenght is the wrong spelling, and the correct one is length.

Correct spelling, explanation: length is the correct form of this noun. It originates from the adjective long with suffix -th, which creates abstract nouns to express quality. In Old English: lengthu of Germanic origin, then the word transformed into today’s form length. Length is also related to Dutch lengte, and to word long. This is also why lenght is incorrect.

Definition of length:
noun, a measure of time or space in some more or less regular units or intervals; the longest linear extent (measurement of something from end to end),
Can you tell me what is the length of the mattress you need?
The length of the road seemed endless as they drove through the countryside.
She used a measuring tape to determine the length of the shelf before installing it.
She measured the length of the pool to calculate how much chlorine was needed to maintain it.
The length of the train was impressive, with cars stretching as far as the eye could see.
The length of lectures at this university is usually 90 minutes.

Idioms and expressions with length:
Here is a short list of popular phrases with the word length:
→ at length – fully, thoroughly; at last:
We discussed the problem at length and came to the conclusion.
→ to go to any lengths – when someone is very desperate and wants to achieve something no matter how extreme their methods are:
He would go to any lengths to win this race.
→ at arm’s length – to keep at bay or to be very close to a person (so you can reach it with your arm straight):
length so that they’re safe from any potential thieves.
Just in case, the nurse is always at your arm’s length.
→ to be of no great length – to be brief or concise, to be short in duration,
The speech was of no great length, so it didn’t take that long to deliver.
→ cut to length – to trim or adjust to the desired size or length,
I needed to cut the fabric to lenght before sewing it into a dress.
→ at any length – to any degree or extent,
I’ll do whatever it takes to succeed, I’m willing to go to any lengths.
→ cable length – the measurement of a cable, often expressed in feet or meters,
I need to check the cable length to make sure it’s long enough to reach the outlet.
→ full-length – the entire or complete length of something,
The full-length dress went all the way down to the floor.
→ arm’s length – the distance between one’s hand and elbow when the arm is extended straight out, used to describe maintaining a distance or avoiding intimacy with someone,
I’m trying to keep my ex at arm’s length, I don’t want to get involved again.
→ go to any lengths – to make great efforts or take extreme measures to do something,
She’ll go to any lengths to get what she wants, no matter what the cost.
→ to go to great lengths – to make a lot of effort or take great measures to do something,
He went to great lengths to find the perfect gift for his friend. I have to admit she was very charming.
→ focal length – the distance from the center of a lens to the point where an image is in focus, used to describe the magnification or angle of view of a lens,
The camera has a wide-angle lens with a short focal length.

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling