This is the 4356th most frequent Japanese word.
単独
"単独" means "solo" or "alone."
The word '単独' here emphasizes that the action is done alone, highlighting the individual's effort without external help.
彼は単独でそのプロジェクトを完成させました。
He completed the project independently.
In this case, '単独' refers to the state of being by oneself, indicating the challenge of performing something without assistance.
その作業は単独では難しいです。
That task is difficult to accomplish alone.
Here, '単独' is used to stress the importance of considering group involvement, suggesting the risks of acting alone.