This article explores the linguistic representation of the concepts of heat and cold in English and Uzbek. The study focuses on temperature-related adjectives such as hot, warm, cold, cool in English and issiq, iliq, sovuq, salqin in Uzbek. These adjectives are analyzed not only in their direct physical meanings but also in their metaphorical, emotional, and cultural uses. The findings show that heat is often associated with emotional closeness, kindness, intensity, anger, and activity, while cold is linked to emotional distance, indifference, fear, and negative evaluation. The comparative analysis reveals both universal cognitive patterns and culture-specific features in the use of temperature adjectives. In Uzbek, warmth is closely connected with hospitality, sincerity, and interpersonal respect, whereas in English, temperature adjectives are widely used in idiomatic and evaluative expressions. The study concludes that the concepts of heat and cold are important linguistic and cognitive categories in both languages.