枉然 /wǎngrán/ angolul

fruitless▼(unproductive; useless)
adjective
[UK: ˈfruːt.ləs] [US: ˈfruːt.ləs]

futile▼(incapable of producing results)
adjective
[UK: ˈfjuː.taɪl] [US: ˈfjuː.təl]