IPA: /ˌɛrəˈneɪʃəs/
KK: /ˈɛrɪˌneɪʃəs/
Describing something that is related to or made of sand, often found in sandy environments.
The arenaceous soil was perfect for growing certain types of plants that thrive in sandy conditions.
Arenaceous → It is formed from "arena" (from Latin *arena*, meaning sand) and the suffix "-ous" (meaning full of or possessing). The word "arenaceous" means full of sand or sandy in nature.
Think of 'arena' which means sand, and remember that 'arenaceous' describes something that is full of sand.