Sentence:  Universal Plant Edibility Test The following sounds like a lot of work—it is!—but that's because it comes from the US Army Survival Manual as republished in 1994 as "a civilian's best guide for <WSD>toughing</WSD> it, anyplace in the world...a must for campers, hikers, explorers, pilots, and others whose vocation or avocations require familiarity with the wilderness or out-of-doors..." 
Meaning of the word marked with <WSD> tags:  To endure.