To unscramble 'acaridae,' follow these steps: 1. List the letters: A, C, A, R, I, D, A, E. 2. Start by identifying common letter pairings, such as 'ar,' 'ai,' or 'ca.' 3. Consider the length of the word you want to form; in this case, look for words that are 3-8 letters long. 4. Rearrange the letters systematically, trying different combinations. 5. Use a dictionary or anagram tool to check if the combinations form valid words.