gel·id \ˈjelə̇d\adjective Etymology: Latin gelidus, from gelu cold, frost — more at cold : extremely cold : icy < the gelid waters of the Atlantic > < a man of gelid reserve — New Yorker > • ge·lid·i·ty\jəˈlidəd.ē, jeˈ-\noun-es • gel·id·ly\ˈjelə̇dlē\adverb