overshadow v.

1、使显得逊色，使黯然失色

He had always been overshadowed by his elder sister.

他和她姐姐相比总是相形见绌。

2、使扫兴，是蒙上阴影

News of the accident overshadowed the day's event。

出事的消息给这天的活动蒙上了阴影

3、掩盖，遮蔽

The garden is overshadowed by tall trees.

花园中大树浓荫密布。