prendre garde

French

(intransitive) to be careful, to take care [with de (+ infinitive) or à (+ infinitive) ‘to do something’; or with à ce que (+ subjunctive clause) ‘that something be ...’]
Tu ferais mieux de prendre garde à ne pas arriver en retard cette fois.
You would do better to take care to not arrive late this time.
(intransitive) to be careful of, to look out for, to watch out for, to pay attention to [with de or à ‘someone/something’]
Prends garde à toi mon vieux, si tu crois que tu vas t’en tirer comme ça tu te mets le doigt dans l’œil !
Be careful, old man, if you think that you can get away with this, you're putting your finger in your eye!