In order that. See So that.
Inside. See In.
Interrogate. See Question or Query.
Intervene. See Come between.
Invalid. See Sick one.
Investigating. See Searching; also Consider.
Iron. See Metal.
Island (Round thing surrounded by water). Sign Land, then with L hands make a horizontal circle; hold left hand in pose, sign Water with right hand; then compress
it and draw it point down around the circle just made. Compare Lake.