IPA: /dɪˌsælɪˈneɪʃən/
KK: /dɪˌsælɪˈneɪʃən/
The process of taking salt out of seawater to make it safe for drinking and other uses.
Desalination is becoming an important method to provide fresh water in arid regions.
Desalination is formed from "de-" (meaning removal) and "sal" (from Latin "sal", meaning salt) and "-ination" (a suffix indicating a process). The word describes the process of removing salt from water, particularly seawater, to make it suitable for drinking or irrigation.
Think of 'removing' ('de-') 'salt' ('sal') from water — that's what desalination means.