soundly 还可作“完全地”“彻底地”“稳健地”解:

The committee soundly rejected all of the proposed changes. 委员会完全拒绝了所有提出的变革。

In 1945, Churchill and the Conservatives were soundly beaten in the election. 1945年丘吉尔及其保守党在选举中遭受惨败。

a soundly based argument 有充分论据的论点

Changes must be soundly in economic reality. 变革必须牢固地建立在经济现实的基础上。