I'm trying to describe a desirable behaviour in user-interfaces (computer interfaces and machine interfaces) such that if you do the action and its opposite action once or more than once (assuming you don't reach an edge/limit) you should end up in the same state.
Pressing right moves the cursor right one character and pressing left moves the cursor left one character. If you press right five times then left five times the cursor will be in the same place, because right and left are
Undo and Redo are
______. If you Undo 3 times then Redo 3 times you should be back to the same state.
Of a tool where the effect of one control depends on the current value of another control:
The length and radius controls are NOT
______when used together. Length is
______while radius remains fixed and radius is
______while length remains fixed, but adjusting either breaks the
______ityof the other one.
Answers to this question offer some good hints, but I don't think any of those are quite right. "Commutative" and "Associative" seem somehow appropriate, but are clearly specific to mathematics.