An empty cave with nothing inside is just hollow space.
Size
Style
● connected
⌘/ · help
nothing
This room is completely empty.
empty
This room is empty.
in vain
He came back empty-handed.
air-to-air (missile)
An air-to-air missile is a type of air-to-air guided missile.
all for nothing
He tried hard for a long time, but the result was nothing.
vacuous
vacant
This room is completely empty.
nothing
This room is completely empty.
empty
This room is empty.
in vain
He came back empty-handed.
air-to-air (missile)
An air-to-air missile is a type of air-to-air guided missile.
all for nothing
He tried hard for a long time, but the result was nothing.
vacuous
vacant
This room is completely empty.