voluntary(adj)-->done,without being forced or paid to it
                      -synonyms=deliberate,autonomous,chosen
                      -antonyms=forced,obligatory
                      - She does voluntary work for charity two days a week
imprison(v)-->to put someone in prison
                  -synonyms=apprehend,commit,hold
                  -antonyms=free,release,liberty
                  -He was imprisoned in 1995 for attempted murder.
overlap(v)-->to cover something partly by going over its edge
                 -synonyms=coincide,imbrication,intersect
                 -antonyms=divide,separate
                 -The fence is made of panels which overlap
affluent(adj)-->having a lot of money
                   -synonyms=rich,prosperous,loaded
                   -antonyms=poor,needy
                   -He is becoming more and more affluent
spatial(adj)-->relating to the position,area and size os things
                 -synonym=spacial
                 -The task is designed to test the child's spatial awareness