dross

"The carpenter carefully placed the tools on the workbench before starting the project. "

"The oxidation of iron causes rust to form on metal objects. "

"The old, tattered textbook was worthless to the student preparing for the exam. "

"the old reliables"

"Even animals in the Jewish system cause impurity only when they are dead."

"Be sure to finish your homework before you go to bed!"

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"The blacksmith carefully hammered the horseshoe onto the horse's hoof. "

"The blacksmith hammered the hot metal into a horseshoe. "

"The goldsmith created a beautiful necklace for her grandmother's birthday. "

"The information about the project deadline resolved my uncertainty; now I know what needs to be completed. "

"The blacksmith was forging a horseshoe in the hot fire. "