咲く (さく) means 'to bloom' or 'to blossom.' This intransitive verb describes flowers opening up. It focuses on the natural process of flowering. For example, '花が咲きます' (Hana ga sakimasu) means 'Flowers bloom.'

咲く (さく) は「咲く」という意味の自動詞です。花が美しく開くときに使います。「花が咲きます」