Change an い-adjective into a verb; 'to make', 'to become'.
Long explanation:
By changing an い-adjective into a verb using く します, you can express actions or changes related to the meaning of the adjective. This structure means 'to make', 'to become', or 'to cause to be'. To form it, replace the final イ (i) in the adjective with く (ku) and add します (shimasu) to create a verb.