wean
US /wiːn/
UK /wiːn/
1.
accustom (an infant or other young mammal) to food other than its mother's milk
:
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The mother cat began to wean her kittens at six weeks.
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It's time to wean the baby from the bottle.
2.
free (a person, an animal, or oneself) of an attachment or habit
:
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He tried to wean himself off coffee.
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The doctor helped her wean off the medication slowly.