単たん独どくで

expression

independently; alone; by oneself; single-handedly

Used when someone does something without help, or when something is done separately from others. Often implies acting on one's own initiative or without assistance.

• 彼かれは単たん独どくでその問もん題だいを解かい決けつした。

  He solved the problem by himself.

• この装そう置ちは単