The word 估计 is formed by combining two characters, each contributing a layer of meaning to create a unified concept. The first character, 估 (gū), carries the core idea of assessment, appraisal, or conjecture, often with a sense of measuring or judging based on experience. The second character, 计 (jì), introduces the notions of calculation, planning, and reckoning. When fused, 估 provides the intuitive, judgmental aspect of "making an estimate", while 计 supplies the methodological, calculative dimension. Together, they form a compound that conceptually represents the act of "estimating" as a process that blends informed judgment with mental calculation.