Similar words: uselessness, noiselessness, purposelessness, senseless, selflessness, carelessness, lifelessness, homelessness. Meaning: ['senslɪsnɪs] 
n. total lack of meaning or ideas.
n. total lack of meaning or ideas. 
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1. So many things that annoyed me by their senselessness.
2. Psychologists have long revealed the senselessness of such exaggerated regulation.
3. Xiaolin's Life of Games depicts a feeling of senselessness in life.
4. Her voice struggled on through the heat , beating against it , molding its senselessness into forms.
5. He tells him about the history of the fire brigade, and the senselessness of books.
More similar words: uselessness, noiselessness, purposelessness, senseless, selflessness, carelessness, lifelessness, homelessness, timelessness, hopelessness, tastelessness, shamelessness, relentlessness, defenseless, lawlessness, artlessness, aimlessness, tactlessness, helplessness, restlessness, fearlessness, fecklessness, listlessness, recklessness, ruthlessness, colorlessness, effortlessness, worthlessness, powerlessness, sleeplessness.