Futile
Part of speech: adjective
Definition: Incapable of producing results; useless; not successful; not worth attempting.
Example sentence: You can be the most intelligent person, and you can have so much potential, but if you don't have a guide by which to channel that energy, then a lot of times, it's futile.
Sleeveless
Part of speech: adjective
Definition: Of a garment, having no sleeves.