feasible(that can be done in practice) adjective [UK: ˈfiː.zəb.l̩] [US: ˈfiː.zəb.l̩]
viable(able to live on its own) adjective [UK: ˈvaɪəb.l̩] [US: ˈvaɪəb.l̩]What you're saying is perfectly viable, but I can't shake off my unease. = Lo que tú estás diciendo es perfectamente viable, pero no me puedo sacudir la inquietud.