within, inner, interior, indoors, inwardly, deep down, exclusive, privileged, wrong, endo, more...

outside, exterior, external, outward, beyond

interior, inward, inner, inside out, more...

deep, dark, warm, white, empty, hollow, cold, dead, black, clean, hot

in it,   being in,   deep within,   into something,   lies within,   foot in the door,   im in,   not outside,   within it,   inner side