Tsujigiri 辻斬つじぎり has a rough literal translation:
Crossroads killing [noun] – Jisho.org
But what it really means is:
The practice of slicing off an unsuspecting person’s head or other body part with a freshly sharpened katana. It’s usually done at night to an innocent passerby who happens to be walking down the wrong dark road at the wrong time.
A person who practices tsujigiri can be referred to as tsujigiri.
To get a better understanding of the word, let’s look at its two parts.
Tsuji 辻つじ is a word not commonly used anymore that means:
“street crossing” or “intersection”, and more broadly, “street.”
Tsuji was originally pronounced tsumuji (つむじ), which now means “hair whorl” using the kanji 旋毛.
Giri comes from kiru 斬るき, which means:
To cut, slash, or slice something off (especially a head or animal body part) with a knife or katana.
When combined with tsuji, the consonant in kiri becomes voiced, meaning the き becomes ぎ. This is caused by a phenomenon called rendaku or “sequential voicing,” which you can read all about in our article. This gives you giri, when combined with tsuji, to form the full word: tsujigiri.