That can be used; that can be readily put to practical use.

Of a substance or material: able to be worked, shaped, or manipulated; mouldable.

That may be used for a purpose; usable, applicable.

That can prevail, able to prevail; (originally) †efficacious; capable of being beneficially used (obsolete); (later) able to be used or accepted…

Capable of being enjoyed.

That one is permitted to touch (in various senses of touch, v.); esp. that can legitimately be interfered with or made use of (cf. touch, v. 17a)…

Capable of being utilized.