to be able to do something: to have the power or the skill that the task requires
Every time this word appears, the thing that can or cannot be done follows right behind it: reveal a dream, read a strange inscription, rescue someone from a furnace, bring a proud king low. It is the plain word for having what a job takes, and it behaves almost exactly the way English "can" does.
What makes it worth noticing is who it gets attached to. All eleven uses fall in the Aramaic chapters of Daniel, and the book keeps drawing one line with it. Babylon's experts are not able to do the thing (Daniel 2:10, Daniel 2:27, Daniel 4:18); the God Daniel serves is able (Daniel 3:17, Daniel 6:20). Even a hostile king concedes it, first to Daniel (Daniel 2:47) and finally about heaven itself (Daniel 4:37).
Aramaic has a second verb for being able, כְּהַל, and Daniel 4:18 sets the two side by side: the wise men are not able (this word) to give the meaning, but Daniel is able (the other one). They are close enough to trade places, so little hangs on which one a verse happens to use. The Hebrew Bible's workhorse for the same idea is יָכֹל, which ranges wider, stretching to "be allowed" and "get the upper hand over an enemy"; in Daniel the Aramaic verb keeps to plain capacity. The Greek word that covers the same ground is δύναμαι.