adj. 1  1. Arising from or going to a root or source; basic: proposed a radical solution to the problem. 2  2. Departing markedly from the usual or customary; extreme or drastic: a radical change in diet.
A security-minded, standards-based container engine. Overview. rkt is an application container engine developed for modern production cloud-native environments. It features a pod-native approach, a pluggable execution environment, and a well-defined surface area that makes it ideal for integration with other systems.
Rift Keystones (or RKs) are small objects that drop randomly or are awarded for completing all five bounties in a given Act in Adventure Mode. RKs have no function on their own and are only useful to open up a Nephalem Rift. As that is a very useful purpose, they are quite valuable objects.