inane
Merriam-Webster's Word of the Day for November 1, 2021 is:
inane \ih-NAYN\ adjective
Inane means "lacking significance, meaning, or point." Synonyms are silly, empty, or insubstantial.
// The host of the show greeted the audience with inane, but laughingly memorable, remarks.
Examples:
"And because the leader insists 'There are no bad ideas,' everyone pipes up with inane or irrelevant suggestions." — Morey Stettner, The Investor's Business Daily, 24 Sept. 2021
Did you know?
Inane suggests emptiness in thought or meaning, and as a noun it has similar use, as in "thoughts making excursions into the incomprehensible inane" (the example is attributed to the 17th-century philosopher John Locke). The noun is not often used nowadays, but the adjective fills the void.