Futile means pointless or useless because it has no chance of succeeding. When something is futile, it's like trying to bail water out of a sinking boat with a teaspoon: you might work incredibly hard, but your effort won't change the outcome.

A futile attempt to stop a soccer ball that's already crossed the goal line won't change the score. Arguing with a referee after they've made their final call is usually futile. Studying the wrong chapter the night before a test makes all that effort futile.

The word carries a sense of wasted energy. Something is futile when no amount of effort will make it work, no matter how hard you try. Trying to convince your parents to let you stay up late on a school night might feel futile if they've already said no three times. Searching for your lost pencil in a huge auditorium after everyone has left could be a futile effort.

Writers sometimes describe futile gestures or futile resistance, meaning actions that can't possibly achieve their goal. Understanding when something is truly futile can actually be useful because it helps you redirect your energy toward efforts that might actually succeed.