How to pronounce “steric” in English

So a lot of this engineering we've done in designing these shape memory polymers is similar to the problems that we face in the 3D printing world.What we're trying to do is engineer cross-links, engineer these multimonomer solutions, engineer the sterics of side chains.So basically, how these little groups hanging off of our main chain polymers interact with each other to make things stronger, to make them stiffer,