function solve () {
  let obj = {
    bit: [
      'a small piece, part, or quantity of something',
      'a short time or distance',
      'write code for a computer program'
    ],
    code: ['write code for a computer program tackle'],
    tackle: [
      'the equipment required for a task or sport',
      'make determined efforts to deal with a problem',
      'write code for a computer program',
      'sometext here'
    ]
  }

  let sorted = Object.entries(obj).map(x =>
    x[1].sort((a, b) => b.length - a.length)
  )

  console.log(sorted)

  // console.log(obj);

  // Output
  //    bit:
  //        ['a small piece, part, or quantity of something',
  //         'write code for a computer program',
  //         'a short time or distance']
  //    code:
  //        ['write code for a computer program tackle']
  //    tackle:
  //        ['make determined efforts to deal with a problem',
  //        'the equipment required for a task or sport',
  //        'write code for a computer program',
  //        'some text here']
}

solve()