Just don’t say that you didn’t notice. More often they write emergency exit, but not emergency.
But why does this happen if intuitively we want to pronounce the letter “o”?
Which option is correct?
It is believed that the word "spare" is more ancient than "spare", and will soon disappear from use. In colloquial speech the word "spare" is more often used. But it's not only that.
Note that the word “spare” and “spare” are not the same word. They are still different, and are not of the same root.
So, "spare" used in context "Danger and salvation" in relation to the room (in case of fire, earthquake). This output is used for emergency situations.
Adjective "spare" used in meaning "additional" in the context of the words "stock", "stock". This outlet is used for daily needs.
There is also legend about why they began to write the letter “Y” and not “O” in the word “spare”.
So, according to legend, for the first time a similar inscription began to be used in Lviv buses, where this word was written as "Spare". In consonance with the Russian "reserve", this word took root and began to use it.
