The word "伟哥" is formed by combining the character "伟" (wěi), which means "great" or "grand", with the character "哥" (gē), meaning "older brother" or often used as a casual suffix for males. This compound directly references the drug Viagra, where "伟" implies potency or effectiveness, and "哥" indicates a male-associated product, resulting in a term that conveys a sense of masculine strength for the medication.