I assume we are also talking no space and no time.nothingness often implies lack of stuff or something
what is the stuff then
lack of mass
lack of energy
lack of field
or lack of something else
physics.In terms of what? Linguistically, something is the opposite of nothing. In terms of matter, anything can be the opposite of nothing. In terms of emotions, happiness could be the opposite of nothing. In Buddhism, disorder could be the opposite of nothing.