First-aider is a term used to describe someone who has undergone basic medical training to provide first aid assistance in case of emergency situations. While the term 'first-aider' is commonly used, there are several other synonyms that can be used to describe the same role. These include medical responder, emergency caregiver, first responder, emergency medical technician, rescue worker, and emergency medical aid provider. These terms are often used interchangeably and refer to individuals who are trained to provide immediate medical attention to address injuries or illnesses in emergency situations. Regardless of the term used, the primary role of any first-aider is to provide prompt medical care until advanced medical help arrives.