title: Regex check a string without a tailing word with a consecutive number
body: <p>i try to ceck a string without a tailing specified word. The word can contain a number at the end [0-9]+.</p>
  
  <pre><code>test test [match]
  test test_word [not match]
  test test_word9 [not match]
  test test_word132 [not match]
  </code></pre>
  
  <p>The regex below work only for _word or _word1..._word9</p>
  
  <pre><code>.*(?&lt;!_word|_word[0-9])$
  </code></pre>
  
  <p>Any suggestions?</p>