The word for toothpaste in Spanish is pasta de dientes.
To break it down, pasta translates to ‘paste,’ de means ‘of,’ and dientes translates to ‘teeth.’ So, literally, it means ‘paste of teeth.’ This is the term you will commonly hear in Spanish-speaking countries when referring to toothpaste. If you ever find yourself in a Spanish-speaking country and need to buy toothpaste, asking for pasta de dientes will help you get exactly what you need.