fatuous
FACH-oo-usadjMeaning silly and pointless, in a smug way
Memory hook a smug grin and a silly idea. Admiring himself in the mirror, Victor announces, “I am far too clever to need books!” His remark is fatuous: silly, and very pleased with itself.
The host kept making fatuous jokes about the weather that no one laughed at.
In context Instead of answering the hard question, the speaker gave a fatuous reply about how everything would surely work out, smiling as though he had said something wise.
Similar silly, foolish, inane, vacuous
Opposite wise, sensible, thoughtful
From Latin fatuus, “foolish.”