Unwilling to share things with others, or wanting to control and own things completely.
From Latin 'possessivus,' related to 'possidere' meaning 'to hold or own.' In grammar, it describes words like 'my,' 'your,' 'his' that show ownership.
Possessive behavior in young children is totally normal because their brains haven't developed 'theory of mind' yet — they literally can't understand that other people's feelings about wanting something are as real as their own!
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