Unconsciousness
Unconsciously, Involuntary
noun, な adjective
Know how 意識 is "consciousness"? What about when this consciousness doesn't exist (aka it is nothing)? That's when it becomes unconsciousness.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. It will help to know how to read 意識, though.
無意識のうちに、舌で虫歯の穴をさわってしまいます。
I can't help but unconsciously tongue the cavity in my tooth with the tip of my tongue.
その無意識につめをかむくせは直した方がいいよ。
That involuntary habit of biting your nails should be fixed.
我々は素晴らしい。何故なら、無意識にクリエイティブになることができるからだ。
We’re awesome because we can be unconsciously creative.