Here's why:
* The "o" in "ogre" is a short vowel sound. It sounds like the "o" in "hot" or "pot".
* Long vowel sounds are usually associated with a vowel being pronounced as its letter name. For example, the "a" in "ate" is a long vowel sound, as it sounds like the letter "a".
Therefore, the word "ogre" has a short vowel sound, not a long vowel sound.