We still have to solve the underlying problem.

We should understand the underlying premises.

What are the underlying causes of Algeria's economic crisis?

Among the familiar things that he would encounter would be creatures recognizably human yet in his view grotesque. While he himself laboured under the weight of his own body, these giants would be easily striding. He would consider them very sturdy, often thick-set, folk, but he would be compelled to allow them grace of movement and even beauty of proportion. The longer he stayed with them the more beauty he would see in them, and the less complacently would he regard his own type. Some of these fantastic men and women he would find covered with fur, hirsute, or mole-velvet, revealing the underlying muscles. Others would display brown, yellow or ruddy skin, and yet others a translucent ash-green, warmed by the under-flowing blood. As a species, though we are all human, we are extremely variable in body and mind, so variable that superficially we seem to be not one species but many.

It is no longer just the elderly and people with underlying medical conditions who end up in the hospital.

There is no underlying condition.

The right of a state to exist is antithetical to the principle supposedly underlying liberal democracy, that people who are subject to a state's rule have the right to abolish it.

The doctor said that the underlying cause of my insomnia is anxiety, so she prescribed me an anti-anxiety medication to take every evening.

We will study the underlying molecular occurrences of fertilization.

“We’re a city with a high rate of poverty, and that can sometimes lead to these underlying health issues because of less access to quality foods and proper healthcare,” says Mollie Pate, a gym owner and local musician.