Protect
Protect["form1","form2",…]
protects all symbols whose names match any of the string patterns formi.
Protect[{spec1,spec2,…}]
protects any symbols that are equal to or match any of the speci.
Examples
open allclose allProperties & Relations (4)
Protecting a symbol is equivalent to setting the Protected attribute:
Protect returns the list of symbols actually protected:
If a symbol is already protected, it is not protected again:
No more definitions can be made for a protected symbol:

To protect all symbols given in a variable, use Evaluate:
Text
Wolfram Research (1988), Protect, Wolfram Language function, https://reference.wolfram.com/language/ref/Protect.html.
CMS
Wolfram Language. 1988. "Protect." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Protect.html.
APA
Wolfram Language. (1988). Protect. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Protect.html