The opposite of opening would be closing or shutting.
The short vowel opposite of "opening" is "closing".
The opposite of not opening is opening. Eight-letter synonyms for opening, depending on context, include clearing, unlacing, exposing, starting
closing
Opening
The word that means the opposite of opening and has a short vowel sound is "closing."
Shutting
Closing
One is shutting.
The opposite of a Crescendo is a diminuendo (dim.) or decrescendo (decres.). It means gradually getting louder.
Mouth would not be the opposite of nose, because they have similarities as sense organs, and work together in breathing.If mouth has an opposite, it would be anus, because that is the opening at the opposite end of the alimentary canal.
Arvo Ojala .
"Start of business" is the expression used for the opening of a Stock Exchange.