There are several words I've found that end in っぱち. Does the suffix have any special meaning, like がち?


It also seems that these are na-adjectives, and it is possible to add さ (for at least some of them) to turn them into nouns. Is this addition possible for all っぱち adjectives?


There is no special meaning. As one of the linked entries says:


I guess these might be originally coined as a wordplay so that it sounds like a person's name. ~はち/~ぱち (八) was a typical male name-suffix in the Edo period (eg 甚八, 新八). Since ancient times Japanese people often created meaningless phrases just because they sound nice (examples).

I don't think でこっぱち ("forehead") can serve as a na-adjective. For やけっぱち and うそっぱち, it's technically possible to add さ, but it's not common because they already have intense meanings (you don't hear 最高さ often, either).


They are all used as intensifiers for noun there. Therefore っぱち itself doesn't have special meanings like がち(serious?)

Since やけ, うそ and でこ are nouns not adjectivals(na-adjective), You can't add さ to nominalize them.

  • Naruto-san. I think you should note that there are discussion on derivation of っぱち. To my knowledge,うそっぱちcan be abbreviation of 嘘八百 and やけっぱち – Wataru 'Watson' Subridge Feb 15 '17 at 14:04

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