The word "assertive" refers to a quality of confidently expressing one's opinions, desires, or rights while also respecting the views and feelings of others. An assertive person communicates openly and honestly without being aggressive or passive, making their needs known while valuing the perspectives of others.
The term "assertive" comes from the Latin word "asservare," meaning "to assert or affirm," combined with the English suffix "-ive," which denotes a quality or condition. It entered into English usage around the early 20th century.