She shook the sand out of her shoes (=removed it by shaking).
[intransitive]if someone shakes, or part of their body shakes, they make small sudden movements from side to side or up and down, especially because they are very frightened, cold, ill etc [= tremble]:
WORD CHOICE: WORD CHOICE: shake, wobble, rattle, vibrate, tremble, shiverShake is a fairly general word. It can be used to talk about objects moving• There was a loud bang and the building shook. It can also be used to talk about people's bodies moving because of cold, strong emotion, or illness• Mary shook with rage. If something wobbles, it moves from side to side because it is not steady or balanced• The desk wobbles when you put anything on it.If something hard rattles, it shakes and makes a quick series of short sounds• The wind blew and the windows rattled.If something vibrates, it makes small quick regular movements that you can hear or feel• The engine began to vibrate.If someone trembles, their body shakes with very small movements, especially because they are angry, afraid, or excited• Trembling, she approached him.If someone shivers, their body shakes with small movements, especially because they are cold or frightened• We sat shivering under a blanket.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.