invisible

All the scribblings in her journals, she tells Steve, are a full accounting of her invisible labor over their many years of marriage.

Negative storms are invisible and can only be detected using satellites.

Because radio waves can penetrate dust and gas that obscure visible light, radio telescopes can observe galaxies invisible to optical instruments.

The videos often seem to come from nowhere — devoid of any context like names, locations or professions — and pop onto a young man’s phone screen, guided by the invisible hand of the algorithm.

The participants, who have spent the last hour squirming, shaking and humming, cross the invisible threshold.