用(よう)心(じん) youjinし shiなさい nasai。 Be careful. Literal Caution-do. The minimal polite command. 用心しなさい = 用心する ('to be careful / cautious') + ~なさい. A one-word warning, typical of a concerned elder or teacher. warningsadvice and suggestionssuru-verb (noun + する)~なさい (polite imperative)
用(よう)心(じん) youjinし shiなさい nasai。 Be careful. Literal Caution-do. The minimal polite command. 用心しなさい = 用心する ('to be careful / cautious') + ~なさい. A one-word warning, typical of a concerned elder or teacher. warningsadvice and suggestionssuru-verb (noun + する)~なさい (polite imperative)