Jquery array push kullanımında bir sorum var

var words = [];
words[12] = {id: 12, word: 'selam 1', answers: [] }
words[25] = {id: 25, word: 'selam 2', answers: [] }
words[36] = {id: 36, word: 'selam 3', answers: [] }

var words = [];
words[12] = {id: 12, word: 'selam 1', answers: [] }
words[25] = {id: 25, word: 'selam 2', answers: [] }
words[36] = {id: 36, word: 'selam 3', answers: [] }

var words = [
    {
    id: 12,
    word: 'selam 1',
    answers: []
    },
    {
    id: 25,
    word: 'selam 2',
    answers: []
    },
    {
    id: 36,
    word: 'selam 3',
    answers: []
    }
    ];
    
    words[1].answers.push(['deneme'], ['deneme2'], ['deneme3']);
    
    alert(words[1].answers.join('|'));