1. 治好(疾病)，摆脱(坏习惯等)
If you shake off something that you do not want such as an illness or a bad habit, you manage to recover from it or get rid of it.

2. 甩掉,摆脱(跟随的人)
If you shake off someone who is following you, you manage to get away from them, for example by running faster than them.

3. 甩开，甩掉(使不接触)
If you shake off someone who is touching you, you move your arm or body sharply so that they are no longer touching you.

1. get rid of

e.g. he shed his image as a pushy boss
shed your clothes

Synonym: shedcastcast offthrowthrow offthrow awaydrop

2. get rid of

e.g. I couldn't shake the car that was following me

Synonym: shakethrow offescape from