Workers underpin the old arch with oak beams before the restoration begins.

Her rigorous research underpins the new policy recommendations.

By underpinning the argument with new data, the team strengthened its position in the debate.

During the renovation, engineers discovered that the underpinning beneath the stone wall had cracked and needed immediate repair.

The committee underpinned the new policy with extensive data from community surveys.

Scholars debated the underpinnings of the new theory late into the night.

As the underpinner of the project, she ensured that every process had a solid theoretical basis.

The underpinners worked through the night to stabilize the old theater's foundations before the morning performance.