noninterchangeable
— Adjective
– English
~ such that the terms of an expression cannot be interchanged without changing the meaning; "the arguments of the symmetric relation, `is the father of', are noninterchangeable"
nonintersecting
— Adjective
– English
~ (of lines, planes, or surfaces) never meeting or crossing
noninvasive
— Adjective
– English
~ relating to a technique that does not involve puncturing the skin or entering a body cavity