serviceable
adjective /ˈsɜːvɪsəbl/
  /ˈsɜːrvɪsəbl/
- of good enough quality to be used- The carpet is worn but still serviceable.
 Word OriginMiddle English (in the sense ‘willing to be of service’): from Old French servisable, from servise or Latin servitium ‘slavery’, from servus ‘slave’.