The word 没错 is formed through the direct and literal combination of its two component characters: 没 (méi), meaning "not" or "without", and 错 (cuò), meaning "mistake" or "error". Their union creates a compound whose core meaning, "not wrong" or "without error", emerges naturally from this simple negation of a mistake. This conceptual blend then seamlessly extends to express affirmative agreement, essentially conveying "that is correct" or "exactly right", as confirming something to be without error is functionally the same as asserting its truth.