Wean (verb)

1. To accustom (a young child or animal) to food other than milk.
2. To gradually withdraw (a person or animal) from dependence on something.
3. To detach or cause to lose interest or attachment.

Origin:

Middle english wenen, from old english wenian; akin to old high german wenēn to wean.

Examples:

1. It's time to wean the baby off of the bottle.
2. I'm trying to wean myself off of sugar.
3. The mother began to wean the puppy from the milk and started to feed him solid food.
4. He weaned himself of the need to smoke.
5. She weaned the child from breastfeeding after one year.