What does « To shake / To stir » mean in the Quran?

And shake toward you the trunk of the palm tree; it will drop upon you ripe, fresh dates.

O People, if you should be in doubt about the Resurrection, then [consider that] indeed, We created you from dust, then from a sperm-drop, then from a clinging clot, and then from a lump of flesh, formed and unformed - that We may show you. And We settle in the wombs whom We will for a specified term, then We bring you out as a child, and then [We develop you] that you may reach your [time of] maturity. And among you is he who is taken in [early] death, and among you is he who is returned to the most decrepit [old] age so that he knows, after [once having] knowledge, nothing. And you see the earth barren, but when We send down upon it rain, it quivers and swells and grows [something] of every beautiful kind.

And [he was told], "Throw down your staff." But when he saw it writhing as if it were a snake, he turned in flight and did not return. [Allah said], "O Moses, fear not. Indeed, in My presence the messengers do not fear.

And [he was told], "Throw down your staff." But when he saw it writhing as if it was a snake, he turned in flight and did not return. [Allah said], "O Moses, approach and fear not. Indeed, you are of the secure.

And of His signs is that you see the earth stilled, but when We send down upon it rain, it quivers and grows. Indeed, He who has given it life is the Giver of Life to the dead. Indeed, He is over all things competent.