usable
adj. B1 Intermediate US //ˈjuzəbəɫ// UK //jˈuːzəbəl// us·able
adj. able to be used for a specific purpose. You call something usable when it works well enough for what you need.
adj. fit for use; suitable for a particular purpose or function. Often implies a threshold of adequacy rather than excellence.
The old chair is still usable.
The software update made the interface more usable for new employees.
While the prototype was functional, its rough edges rendered it barely usable in high-stress environments.
From Old French usable, from the verb user (“to use”).