The word "DELTASE" can be confusing when it comes to spelling. Its correct pronunciation is [ˈdɛltəs], with the stress on the second syllable. The "DELTA" part is easy to grasp, however, the "-SE" ending can pose a challenge. The letter "S" is silent here, and it only serves as a marker for the plural suffix -ES. Therefore, the word is spelled with an "-E" at the end instead of "-ES." It is essential to pay attention to such details to communicate accurately in writing.