irrelevant (adj.)
- adrift
- alien
- dinky
- dispensable
- extraneous
- extrinsic
- foreign
- gratuitous
- ill-chosen
- ill-considered
- ill-sorted
- ill-timed
- immaterial
- impertinent
- improper
- inadmissible
- inapplicable
- inapposite
- inappreciable
- inappropriate
- inapt
- inauspicious
- incidental
- inconsequent
- inconsequential
- inconsiderable
- inconvenient
- inept
- inessential
- inexpedient
- infelicitous
- inferior
- inopportune
- insignificant
- intrusive
- late
- little
- maladjusted
- malapropos
- minor
- minute
- mismatched
- mismated
- misplaced
- negligible
- nonessential
- out-of-the-way
- parenthetical
- premature
- small
- technical
- unadapted
- unbecoming
- unbefitting
- uncalled-for
- unconnected
- unessential
- unfavorable
- unfit
- unfitting
- unfortunate
- unhappy
- unimportant
- unimpressive
- unlucky
- unpropitious
- unqualified
- unready
- unrelated
- unripe
- unseasonable
- unseemly
- unsuitable
- unsuited
- untimely
- untoward
- wrong