underlever means A lever behind the trigger guard of a rifle. Lexicurio rates it Rare gem — a strength score of 82 out of 100.
Etymology
From under- + lever.
noun
- A lever behind the trigger guard of a rifle“Incidentally, the current underlevers developed and produced after World War II are vastly improved over the prewar types, though millions of the latter are still used.”
- A particular piano component.“The wippen, a mechanism of underlevers, controls the jacks that push the hammers up to the strings.”