to defeat someone by having greater strength or power

The gunman was finally overpowered by three security guards. 持枪歹徒最终被3名保安制服。

If a smell or feeling overpowers you, it is so strong that it makes you feel weak or ill.

The heat/smell of gas overpowered me as I went into the house. 我进屋的时候，一股热气／煤气味向我袭来。