| maladjusted |
| matter of indifference(expression, idiom, insignificant, unimportant, trivial) |
| meaningless(insignificant, unimportant, trivial, inconsequential, irrelevant) |
| mismated |
| mistaken(adjective, inadequate, useless, inappropriate, unhealthy) |
| nihil ad rem(expression, idiom) |
| no big deal(expression, idiom, insignificant, unimportant, trivial) |
| no never mind(expression, idiom, insignificant, unimportant, trivial) |
| non-effective(adjective, useless, unfit) |
| non-essential |
| non-serviceable(adjective, useless, unfit) |
| noneffective(adjective, useless, unfit) |
| nonutilitarian |
| nonviable(wild, unreasonable, useless, absurd, abstract) |
| not fit(expression, adjective, inadequate, useless, inappropriate) |
| not germane(expression, adjective, separate, insignificant, unimportant) |
| not important(expression, insignificant, unimportant, irrelevant, superfluous) |
| not pertinent(expression, idiom, irrelation) |
| not proper(expression, wrong, suitable, improper, tasteless) |
| not suitable(expression, adjective, wrong, false, awkward) |