Possible Misspellings:
* Tensity: Refers to a state of being tense, strained, or tight.
* Tenacity: Refers to the quality of being persistent, determined, and not easily giving up.
* Toxicity: Refers to the state of being poisonous or harmful.
If you can provide more context about where you encountered the word "tanasity," it might be possible to determine the intended meaning.