searo does not survive later stages of English, and Wiktionary lists cognates with only other dead languages. Though I believe Tolkien did borrow it for the character Saruman
「像鬼一樣工作」：台灣外籍移工為何陷入「強迫勞動」處境
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Овечкин продлил безголевую серию в составе Вашингтона09:40
the scavaging list