She is regarded as a qua expert.

Trust is the sine qua non of any successful relationship.

In the distant galaxy, astronomers discovered a star that emitted a quadrillion units of energy every second.

She has the necessary qualification for the job.

She must qualify for the scholarship.

The quality of this product is excellent.

She bought a large quantity of apples from the grocery store.

The researcher conducted a qualitative study to gather in-depth information.

It is impossible to quantify the value of life.

Quantitative analysis is used to measure the amount of a substance.