Emphasize means to give special importance or prominence to something in speech or writing. It is used to:
* Highlight something: "The teacher emphasized the importance of studying for the exam."
* Make something stand out: "The brochure emphasized the resort's luxurious amenities."
* Stress a particular point: "The speaker emphasized the need for unity."
Therefore, "emphasised" means that something was given special importance or prominence in the past.