malapropos
1
adj ill-timed, impertinent, inapposite, inappropriate, inapt, inopportune, misapplied, out of place, unseemly, unsuitable
2
adv impertinently, inappositely, inappropriately, inaptly, inopportunely, out of turn, unseasonably, unsuitably, untimely
3
n blunder, faux pas, gaffe, malapropism, solecism