This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The characteristic of being half-hearted.

"But I do not fear the word rupture — rupture with habits of thought, with ideas, with behaviors of the past that have prevented us from advancing, from grasping the future between our two arms … I want rupture with intellectual conformity … I want rupture with halfheartedness, I want rupture with conservatism, I want rupture with immobility."

rhabdomyolysis    porousness    shakeout    spasticity    fatigability