If you put clear tape on frosted glass it becomes see-through.  
You could try that if it's meant to be a momentary peek-though situation.  
http://2.bp.blogspot.com/-NigB-tBnEcI/Tbc8n4rQLXI/AAAAAAAAATE/M2cFNgAN7GI/s400/scotch_tape_privacy_glass.png

Or you could mostly frost it with white alcohol ink.  
http://www.psiloveyouscrapbooking.com/candle-holders-using-adirondack-alcohol-ink-by-tim-holtz
Just leaving enough of an open lattice to achieve a veiled appearance.