The crossword solution for the term MAKE TOUGH is STEEL. STEEL is an alloy of iron and carbon, and is one of the most commonly used materials in the world. It is known for its strength and durability, making it an ideal material for construction and manufacturing. STEEL is also used in many other applications, such as automotive parts, tools, and appliances. Its ability to withstand extreme temperatures and pressures makes it a popular choice for many industries.