From Wiktionary, the free dictionary
From Latin tensus ‘tense’ + -ity. Compare intensity.
tensity (usually uncountable, plural tensities)
- The quality of being tense (literally or figuratively); tension.
1942, Rebecca West, Black Lamb and Grey Falcon, Canongate, published 2006, page 994:That broke the tensity of the children's interest, and they ran back into the house