Identify the incorrectly spelt word:

The correct option representing the incorrectly spelt word is Inadvartant.

Step-by-Step Breakdown:

1. Inadvartant: This is the incorrectly spelt word. The correct spelling is Inadvertent (with an 'e' instead of an 'a' in the third syllable). It means not resulting from or achieved through deliberate planning; unintentional.

2. Avaricious: This word is spelt correctly. It means having or showing an extreme greed for wealth or material gain.

3. Temerarious: This word is spelt correctly. It means reckless, rash, or foolishly bold.

4. Repentant: This word is spelt correctly. It means expressing or feeling sincere regret or remorse about one's wrongdoing or sin.