fruitless

(adjective) useless, not providing a result

Example Sentences:

A: How was your exam?
B: Studying for it was fruitless, because I only got 48%.

Mary: How is your exercising going? Are you losing weight?
John: No. I run for 2 hours a day and I am still overweight.
Mary: What are you eating?
John: I eat 3 fast food meals per day.
Mary: Well, it is fruitless to exercise if you are going to keep eating fatty food.
John: Oh.

From the News:

Marine felt mission ‘a bit fruitless’

Media:

Similar idioms:

1. slop
2. stuffed