Usable (adjective)

1. Capable of being used.
2. Fit or suitable for a particular purpose.

Origin:

From the middle english word "usen" which means "to use" and the suffix -able which denotes capability or suitability.

Examples:

1. The software is now usable after the updates were installed.
2. The phone is still usable even though the screen is cracked.
3. The chair is usable but it needs to be cleaned.
4. The bridge is not usable because it is under construction.
5. The land is usable for agriculture.