Assalamu Alaikum, Kindly let me know the correct meaning of Aariz, how is it spelled and what's the interpretation of the Quranic ayyat: فَلَمَّا رَأَوْهُ عَارِضًا مُّسْتَقْبِلَ أَوْدِيَتِهِمْ قَالُوا هَٰذَا عَارِضٌ مُّمْطِرُنَا ۚ بَلْ هُوَ مَا اسْتَعْجَلْتُم بِهِ ۖ رِيحٌ فِيهَا عَذَابٌ أَلِيمٌ And when they saw it as a cloud approaching their valleys, they said, "This is a cloud bringing us rain!" Rather, it is that for which you were impatient: a wind, within it a painful punishment [46:24]
Answer
Please see this page which has the meaning and pronunciation: Aariz
As for how to spell it, the Arabic spelling is in the above link, but in English you can spell it however you like, since it is not an English word.
As for the verse you mentioned, you already included the interpretation (translation), for this reason I don't see what else I should say about it, the meaning is clear: they saw something in the sky, they thought it as a cloud that would bring them rain, but they were wrong.