Enthusiastic is a tricky word for many non-native English speakers. The correct pronunciation of the word is "en-THOO-zee-as-tik". Here's a step-by-step guide for how to pronounce enthusiastic:

1. Start by pronouncing "en" like the word "in".

1. Next, combine the "th" sound with the "oo" sound to make the "thoo" sound. To make this sound, tighten your lips and keep your tongue in the middle of your mouth.

1. Then, pronounce the "zee" sound like the letter "z".

1. Finally, pronounce the "as" sound like the word "ah" and the "tik" like the word "tick".

Now that you know how to pronounce enthusiastic, you can practice saying the word out loud to make sure you have the right pronunciation. With enough practice, you'll be able to confidently say the word in any conversation.