This is the 9130th most frequent Japanese word.
無意識
"Unconsciousness" or "subconsciousness."
In this sentence, '無意識' is used to describe an action done without conscious thought or awareness, characteristic of routine or habit.
彼は無意識に鉛筆を回していた。
He was spinning the pencil unconsciously.
Here, '無意識に' signifies an occurrence or reaction happening without intentional effort, referring to a subconscious process.
無意識に過去の感情を思い出してしまうことがあります。
Sometimes, past emotions are recalled unintentionally.
In this context, '無意識' is used more as a noun referring to the psychological concept of the subconscious mind.