mint/api-v13/app/Models/WordIndex.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class WordIndex extends Model
{
    use HasFactory;

    protected $fillable = ['id', 'word', 'word_en', 'count', 'normal', 'bold', 'is_base', 'len'];
}