Ethereal

adjective/ɪˈθɪɚ.i.əl/literary

Definition

Extremely delicate and light in a way that seems too perfect for this world.

Etymology

From Latin aetherius (“of or pertaining to the ether, the sky, Heaven or the air or upper air”), from Ancient Greek αἰθέριος (aithérios, “of or pertaining to the upper air”). By surface analysis, ether +‎ -ial.

Synonyms

aetheric, etheric

In a sentence

The UI had an ethereal quality that made it feel weightless.