無意識

1. Origins, structure, and basic meaning

• Structure: 無意識 is read as むいしき and is a noun and adjectival noun for loss of consciousness or for mental activity and behavior outside conscious intention.
• Basic usage: Use 無意識の状態 for unconsciousness and 無意識に手を伸ばす for an automatic action.

2. Common pitfalls and similar expressions

• Do not merge the two states
  • Doing something 無意識に does not mean being unconscious; the person may be awake but unaware of the action.
• の and に
  • 無意識の modifies a state or domain, while 無意識に adverbially marks an action as unintended.