IPA: /ˌrɛl.əˈtɪv.ɪ.ti/
KK: /rɪˈlætɪvɪti/
A concept in which the importance or existence of something is determined by its relationship to something else, often used in physics to describe how different observers may measure the same event differently depending on their relative motion or position.
Einstein's theory of relativity changed our understanding of space and time.
Relativity → It is formed from "relativus" (from Latin, meaning related) and the suffix "-ity" (meaning the state or condition of). The word "relativity" refers to the state of being related or the condition of being dependent on something else.
Think of 'related' to remember that 'relativity' describes how things are connected or dependent on each other.