Part of speech: Adjective
failing to keep in mind
Example: forgetful of her responsibilities; oblivious old age
Unmindful, Mindless, Short, Oblivious, Forgetful
The word "forgetful" comes from Middle English *forgetful.
forget – A related word in the same word family.
ful – A related word in the same word family.
A word with PIE origins means it's been passed down through human mouths for over 6,000 years!