IPA: /ˌhaɪpərsəˈlɪnɪti/
KK: /haɪpərsəˈlɪnɪti/
A condition where the salt concentration in water is unusually high.
The hypersalinity of the lake made it difficult for most fish to survive.
Hypersalinity is formed from "hyper-" (meaning over or excessive) and "salinity" (from Latin "salinitas", meaning saltiness). The term describes a condition where the salt concentration is excessively high.
Think of 'hyper-' meaning excessive, and 'salinity' referring to saltiness — this helps you remember that hypersalinity means an excessive amount of salt.
No commonly confused words.