This is the 2470th most frequent Japanese word.
余
"余" (yo) means "surplus," "remainder," or "extra."
The usage of '余' here denotes 'extra' or 'surplus,' referring to an amount of time exceeding what is necessary.
時間が余っていますので、もう少し話しましょう。
We have extra time, so let's talk a bit more.
Here, '余' is used in the compound word '余所,' meaning 'other' or 'outside,' indicating a place different from the focal point.
余所を見ている間に、大切なものを失くしてしまった。
While I was watching elsewhere, I lost something important.
The term '余剰' where '余' appears signifies 'surplus,' implying that the idea was considered unnecessary or extra.