Dissociate (verb)

1. To separate or disconnect (something) mentally or emotionally.
2. To separate (a chemical compound) into simpler substances.

Origin:

From latin dissociare "to separate", from dis- "apart" + sociare "to associate".

Examples:

1. He dissociated himself from the group after disagreeing with their actions.
2. She dissociated herself from her past after experiencing trauma.
3. The patient dissociated during the therapy session.
4. The chemist dissociated the compound into its component atoms.
5. The scientist dissociated the molecule to study its properties.