Complex sentence: A girdle is a undergarment made of elasticized fabric and worn mainly by women that encircles the lower torso, perhaps extending below the hips, and worn often for support.
Split into simpler sentences: A girdle is a undergarment made of elasticized fabric and worn mainly by women. It is a Foundation garment that encircles the lower torso, perhaps extending below the hips, and worn often for support.