The word "不吝" is formed by directly combining the negation character "不" (bù), meaning "not", with the character "吝" (lìn), meaning "stingy" or "grudging", resulting in a literal meaning of "not stingy" that functions as a phrase to convey generosity or a lack of hesitation, typically used in expressions like "不吝赐教" to mean "please do not hesitate to give advice".