The term 'sturdy trousers fabric' can be summarized as a type of fabric known as CHINO, which is a five-letter word. CHINO is a twill fabric made from cotton or a blend of cotton and synthetic fibers. It is usually woven in a plain weave and is characterized by its smooth, matte finish. CHINO is often used to make trousers, shorts, and other garments that require a sturdy fabric. It is also popular for its wrinkle-resistant properties and its ability to hold its shape.