public static function singularize($word)
{
$result = array_search($word, static::$specials, true);
if ($result !== false) {
return $result;
}
foreach (static::$singulars as $rule => $replacement) {
if (preg_match($rule, $word)) {
return preg_replace($rule, $replacement, $word);
}
}
return $word;
}