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ambivalent vs indifferent

Ambivalent is an adjective we use to show when we're uncertain about how we feel about something or we're unable to decide what to do. People sometimes use it to show that they don't care one way or the other.

For example: " At the end of two sessions she was ambivalent about making another appointment."

Indifferent is an adjective, which means not interested or not thinking about something or someone.

For example: "She found it very hard to teach a class of indifferent teenagers."