Yserbius, that is the word in Modern Hebrew. However, in Mishnaic Hebrew the closest word is רשות. Sometimes it means “permission” although it can also mean “option”.
CTL, you are twice wrong. First of all, it should be “are reserved” as “powers” is plural. Secondly, the Tenth Amendment says ““The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people”. Tsk, tsk. You are correct, though, about the distortion of the Interstate Commerce Clause. The Civil Rights Act of 1964, for example, is blatantly unconstitutional as applied to local businesses. The Fair Housing Act and the Federal minimum wage are also examples. After the “switch in time that saved nine” (although that involved a state law) SCOTUS indeed was complicit but there was a turnaround with Lopez vs. United States 514 U.S. 549 (1995).