Chalak and taiz are adjectives used to describe a bahu or even a saas that has a backbone.
Simple would be a girl who simply cant do that.
Ooooh, I like that! And it's better to be chalak/taiz than naive/stupid! This world is a tough place to survive for the naive. You need courage and WITS/INTELLIGENCE to combat a monster-in-law (MIL) and Snitch-in-law (SIL). LOOOOL!