straight from one place to another; while one is at it; on the way
Indicates doing something immediately after arriving or while still in the same trip, without returning home or making a separate trip. Often used with movement verbs like 行く, 寄る, 買う.
When I arrived at the station, I went straight to the office.
While I was out shopping, I also stopped by the bank on the way.
Archaic kanji form using 其の for その; rarely used in modern writing.
Literally 'with those feet', from その (that) + 足 (feet) + で (with). The phrase metaphorically extends the idea of using the same pair of feet to continue moving without interruption.