deepen

The deal, if it happens, would be a strategic advantage for Moscow, which has struggled to deepen its foothold on the continent.

Tian added that the drop deepened "uncertainty" around China's efforts to modernise its military.

Western governments seek to deepen their presence in the Arctic to catch up with Russia.

TEL AVIV—An Israeli military raid in a village in southern Syria erupted into deadly clashes early Friday, deepening a rift between the two neighbors as Israel moves to secure its northern borders.

His covetous comments about Greenland, an autonomous Danish territory, deepened concerns.