ASL has a variety of very specific signs for the concept of "open" - depending on
your exact meaning. Also it is common to mime the act of opening something
specific. For instance, to describe opening a can of caviar I might mime
the act of turning the crank of "can-opener" with my right hand while
holding onto the can of caviar with my left hand. Or I might mime
placing the can into an electronic can opener and pressing the button on
DOOR (and scroll to the "open-DOOR" section.
WINDOW (and scroll to the "open-WINDOW" section.