hyper-arid       
adjective (also hyperarid) uk/ˌhaɪ.pərˈær.ɪd/ us/ˌhaɪ.pɚˈer.ɪd/
 极干燥的,极干旱的
Hyper-arid areas or weather conditions are extremely dry so that little or nothing can grow.
  a hyper-arid desert 极度干旱的沙漠 
 Scientists have warned that global warming could lead to persistent hyperarid conditions.
 - More examples
 - Many communities in hyper-arid regions are fighting for survival.
 - The greatest risk of desertification is in areas adjacent to the world's hot hyper-arid zones.
 - Mars is a hyper-arid environment.
 - The prevalence of the virus in this hyperarid zone was higher than that found in more humid countries.