Loss is the main word used to signify the 12th house. Other significators of 12th house are any thing happening in hidden places, hospital,prison,foreign land etc.Before asking the question what do we loose in 12th house? We should ask ourself the question what did we bring to earth when we were born and what are we going to take back after our death.
All the material we got were taken from here. We can just play with it or give it to some one or leave it here for some one. Ideally no one owns anything, Not even our bodies which has to be given back to earth when we leave.
So seeing 12th house as an house of loss is misleading. 12th is the house where our physical body represented by the 1st house is dissolved also our personality from 1st house is dissolved and we become boundless. Dissolving in 12th house is not the same as the death in 8th house. Death from 8th house is a transformation from physical to non physical without awareness. But death from 12th is dissolution in to pure awareness.
12th is also the silence in meditativeness. When we want to be in meditative ecstasy we cannot hold on to anything material, we need to forget the body.
12th house is the house of charity and donations we make. Volunteering with no gain and working hard on something leading to material gain which we may never enjoy are part of 12th house.
Going to forgein land and wandering are part of 12th house. 12th house travel is different from the travel due to 7th house.12th house travel will make us loose our attachment to home.
12th house dissolves the characteristics of the planet sitting there. Mercury looses it’s articulated speech,mars it’s agression……
12th house is just an blessing in disguise……