The spelling of the word "derouin" is not straightforward and might confuse many people. The word is pronounced as /dɛruɪn/ in IPA phonetic transcription. The first syllable "de-" is pronounced as "duh" with a short e-vowel sound. The second syllable "-rouin" is pronounced with a long u-vowel sound, just like in the word "ruin." However, the letter combination "-ouin" in "derouin" might suggest a French origin of the word. Nonetheless, it is essential to note that the spelling of words can be tricky, and IPA phonetics can help in mastering the correct pronunciation of words.