What does « Khwā » mean in the Quran?

Or [consider such an example] as the one who passed by a township which had fallen into ruin. He said, "How will Allah bring this to life after its death?" So Allah caused him to die for a hundred years; then He revived him. He said, "How long have you remained?" The man said, "I have remained a day or part of a day." He said, "Rather, you have remained one hundred years. Look at your food and your drink; it has not changed with time. And look at your donkey; and We will make you a sign for the people. And look at the bones [of this donkey] - how We raise them and then We cover them with flesh." And when it became clear to him, he said, "I know that Allah is over all things competent."

And his fruits were encompassed [by ruin], so he began to turn his hands about [in dismay] over what he had spent on it, while it had collapsed upon its trellises, and said, "Oh, I wish I had not associated with my Lord anyone."

And how many a city did We destroy while it was committing wrong - so it is [now] fallen into ruin - and [how many] an abandoned well and [how many] a lofty palace.

So those are their houses, desolate because of the wrong they had done. Indeed in that is a sign for people who know.

Which Allah imposed upon them for seven nights and eight days in succession, so you would see the people therein fallen as if they were hollow trunks of palm trees.