imperceivable (adjective) hidden: unseen, secret
Sinonime: apologetic, conscience-stricken,
contrite, crestfallen, dejected,
depressed, disconsolate, down, downcast, downhearted,
guilty, low,
regretful,
remorseful, sad,
upset, woebegone
Antonime: bare, exhibited,
exposed,
open,
out, seen,
showing, uncovered