V-ERG
（使）减小;（使）减弱;（使）降低
When something diminishes, or when something diminishes it, it becomes reduced in size, importance, or intensity.
例句
The threat of nuclear war has diminished...
核战争的威胁已经减小了。
Federalism is intended to diminish the power of the central state...
联邦制旨在削弱中央政府的权力。