You can use lower to refer to people or things that are less important than similar people or things. 下等的; 低级的
noun [抽象名词] （缓慢地）放下，降下；减少，降低；降下人或物
She never cheapened herself by lowering her standards. 她从不降低标准来贬低自己。
adjective [原级] 乌云密布的，阴沉的；黑暗的，昏暗的；使低劣的；减少体力的
The lowering of trade barriers has led to a free-for-all among exporters. 降低贸易壁垒导致出口商各自为政。
