A katar is a katar till......

[Jim McDougall]

Originally Posted by Nihl

I agree with Ariel and (it seems) everyone else that this discussion is a bit silly. Whether we like it or not, in modern times, katar is staying as the "common" name for these punch daggers until a tv show or movie calls it a jam(a)dhar.

I also personally prefer the name jamdhar, partially because the (incorrect?) explanation that it means "tooth of death" sounds really cool to me, but also because when I say "katar" out loud it sounds a bit too close to "guitar" for comfort, so jamdhar is easier for me to say .

Actually on that note, though, Mercenary, as you seem rather knowledgeable in Hindi/Sanskrit, is the idea that jama = yama, the god of death, totally false? It's just that, personally, I could totally see yama becoming jama, and, with the edition of dhar, the word overall translating to some version of tooth/blade of death.

Finally, just to continue our discussion of odd katar forms, I've attached some examples that always looked unusual to me (and are hopefully discussion-provoking to you guys). The last one isn't technically a katar, but these odd "parrying weapons" seem to always be mounted with katar blades.

Nihl,
I wanted to address your post directly as you have gratefully redirected away from the linguistics issues to continue the discussion on unusual jamadhar
Most intriguing is the one with five blades which indeed appear to be of jamadhar form, but mounted perpendicularly on what appears to be a 'vambrace'. These have apparently occurred with up to seven blades, but as usual, their manner of use is unclear.

I was surprised to see one offered in sale which showed the interior, which had a centrally situated transverse handle, and it seems suggested it was used in a slashing manner.
I had always though, with the flueret like fixtures at each end (with apertures which seemed for lashing or securing to the forearm) that perhaps these might have been used in a kind of fearsome armor attire......as seen in the curious figure (attached photo) bristling with blades. This somewhat well known photo seems to have fancifully labeled 'the executioner' but I cannot recall the source (I expect my mention of this will result in scathing rebuttal here) and even more specifically has been claimed to be from a durbar in Delhi. Again, I am simply recounting what I recall of this well known image without suggesting or implying accuracy or meaning or intent. It is for the purpose of illustrating 'possible' applications of such 'innovative weaponry'.
As noted, this would seem aside from the example of these with inner handle which obviously would not be worn on the forearm as a vambrace.