Definition of senselessness:
stupidity, silliness, lunacy, ability, fatuity, madness, foolery, vacuum, imbecility, idiocy, mindlessness, zaniness, preposterousness, vacuity, foolishness, incapacity, craziness, rashness, tomfoolery, pointlessness, inanity, heedlessness, folly, insanity.
- insensibility (part of speech: noun)
- unmeaningness (part of speech: noun)
And she answered with all the authority of a sophist: Of that, Socrates, you may be assured; think only of the ambition of men, and you will marvel at their senselessness unless you consider how they are stirred by the love of an immortality of fame.- "The Best of the World's Classics, Restricted to prose. Volume I (of X) - Greece", Various.