缓和 (huǎn hé): 緊張を緩和する （ 緊張 ）

The leaders of the two countries held talks, hoping to ease the tense situation in the border area.

The doctor prescribed him some medicine to help ease the pain.

After the two of them argued, a friend said a few kind words to smooth things over and eased the atmosphere.

The government has taken a series of measures to ease traffic congestion.

Hearing his explanation, my anger gradually subsided.