“unfaithful, yes, unfaithful.” The Hebrew has the figure of speech polyptoton for emphasis (see commentary on Gen. 2:16).
“die.” The Hebrew verb gava (#01478 גָּוַע) refers to dying and is fundamentally synonymous with the verb “die” muth (#04191 מָוֹת), although it can infer a violent death (see commentary on Gen. 25:8, “breathed his last”).