Futile is an English word that can be tricky to pronounce for non-native speakers. To properly say it, start with your mouth in an open position with your lips slightly apart. Then, make a short "fuh" sound, like the beginning of the word "fun". Next, your tongue moves to the roof of your mouth and makes a "tuh" sound. Lastly, bring your lips together and make a "lee" sound. All together, it should sound like "fuh-tuh-lee".
If you are still having trouble, practice saying the word out loud, breaking it into syllables and emphasizing the "tuh" sound. Remember to keep your mouth open, place your tongue on the roof of your mouth, and be sure to add the final "lee" sound. With some practice and patience, you'll be able to confidently say "futile" like a native speaker.