IPA: /əˈrɪdəti/
KK: /əˈrɪdəti/
A long period of time with very little or no rain, leading to dry conditions.
The aridity of the desert makes it difficult for plants to grow.
Aridity is formed from "aridus" (meaning dry) and the suffix "-ity" (meaning the state or condition of). The word "aridity" refers to the state of being dry or lacking moisture.
Think of 'aridus' meaning dry, and remember that 'aridity' describes the condition of being dry.