vacuous

devoid of significance or point

Empty; unfilled; void; vacant.

Latin vacuus, empty

“If we had your set of musicians and talkers!' Nataly smiled in vacuous kindness, at a loss for the retort of a compliment to a person she measured.”

— George Meredith, Complete Project Gutenberg Works of George Meredith

Tobias wandered Beirut's bustling markets, his eyes glazing over the vibrant chaos until he stumbled into a shop filled with identical blue vases. The salesman's vacuous smile widened as Tobias felt more lost than ever among the sea of sameness.

At Tashkent's Chorsu Bazaar, Thandi wandered past stalls piled high with vibrant textiles and spices, yet her mind felt as empty and vacuous as the abandoned kiosk where a single wilted flower drooped in the harsh sunlight.

“She describes the "vacuous impassivity" of the ultrasound technician who gives her the first glimpse of her new baby.”