The phrase "不吝赐教" is formed by first combining the negation "不" (not) with "吝" (stingy or reluctant) to create "不吝" meaning "not reluctant". This is then directly paired with "赐教", where "赐" (to grant) and "教" (teaching or instruction) together mean "grant instruction". The entire phrase structurally links these components to convey the literal sense of "do not be reluctant to grant teaching", used as a fixed polite expression to request advice.