ether

noun
1
a clear liquid made from alcohol, used in industry as a solvent and, in the past, in medicine to make people unconscious before an operation
اتر, اتر بی‌هوشی, اتر دارویی, اتر طبی
2
the upper part of the sky
اثیر, عرش, آسمان برین
Her words disappeared into the ether.
3
the air, when it is thought of as the place in which radio or electronic communication takes place
اثیر
The messages simply vanish into the ether after 24 hours.