Meaning: This means that there is a rug on the floor that helps keep feet warm.
Choice of Words: Rug is a piece of thick fabric that is laid on a floor for warmth, decoration, or soundproofing.
Meaning: This means that the rug causes the person's cold feet to feel warmer.
Choice of Words: My means that the feet belong to the person speaking. Makes means to cause something to happen.
Meaning: This means that the comfortable and warm rug makes the person's very cold feet feel warmer.
Choice of Words: Cozy means comfortable and warm. Icy means very cold, like ice.