The word "千叮万嘱" is formed by directly combining the numeral "千" (thousand) with the verb "叮" (to urge) and the numeral "万" (ten thousand) with the verb "嘱" (to instruct), creating a literal meaning of "a thousand urgings and ten thousand instructions". This structure employs numerical exaggeration to intensify the sense of repeated admonitions, resulting in a fixed phrase that emphasizes giving frequent and earnest advice or warnings.