The term 'ENCLOSES SECURELY' can be summarized by the crossword solution 'EMBEDS' (6 letters). This means to place something firmly within something else, usually in a secure manner. It is often used to describe the process of placing an object within a larger object, such as embedding a stone in concrete or embedding a chip in a circuit board. Embedding is also used to describe the process of placing text or images within a document or webpage.