This is a fragment - the sentence is incomplete, it lacks a main verb. It would be a complex sentence if it was finished, if it said - ...a concrete symbol that would provide the substance they needed to restore their shaken hope <em>presented itself to them, </em>or something along those lines. Since there is no such verb, the sentence is not finished.
Assuming that plumbs is the underlined word, ignores would be the antonym
Christopher Columbus was far from a good man. He bridged the old world and the new world. But he committed mass genocide. Enslaving and Murdering countless of Indigenous Peoples’, who were merely used as pawns. they deserved more respect.
Socs, who jump greasers and wreck houses and throw beer blasts for kicks, and get editorials in the paper for being a public disgrace one day and an asset to society the next.
I believe that Lady Macbeth's words to her husband most often express her dissatisfaction with him. She believes he is not strong enough, she is emasculating, making her husband feel he's not a real man. She often says she wished she were born a man, so that she could do everything her weak husband isn't capable of doing.