"Buckle up! It's the ___" (3)
I believe the answer is:
law
(Other definitions for law that I've seen before include "Legislation" , "Regulation" , "Act" , "Commandment" , "Edict" .)
I believe the answer is:
law
(Other definitions for law that I've seen before include "Legislation" , "Regulation" , "Act" , "Commandment" , "Edict" .)