This adjective denotes something or someone useless or unprofitable, unable to fulfill their intended purpose. Classical Greek applied it to anything from unfit warriors to unproductive tasks, with the core idea of failing to provide benefit or service. In the New Testament, Jesus uses it in the parable of the talents for the 'unprofitable servant' who buried his master's money (Matt 25:30), while Luke records Jesus teaching that even faithful servants should consider themselves 'unprofitable' after doing their duty (Luke 17:10). The word combines the negative prefix with a root related to use or service, creating the sense of 'not fit for use.'