напразен означава в английски

feckless▼(lacking purpose)
adjective
[UK: ˈfe.klɪs] [US: ˈfe.kləs]

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

idle [idler, idlest]▼(of no importance, worthless, useless)
adjective
[UK: ˈaɪd.l̩] [US: ˈaɪd.l̩]

nugatory▼(ineffective, invalid)
adjective
[UK: ˈnjuː.ɡə.tə.ri] [US: ˈnjuː.ɡə.tə.ri]

vain [vainer, vainest]▼(pointless, futile)
adjective
[UK: veɪn] [US: ˈveɪn]

void [voider, voidest]▼(not producing any effect; ineffectual; vain)
adjective
[UK: vɔɪd] [US: ˌvɔɪd]