訓 はなは(だ),はなは(だしい) ・ 音 ジン 🔊
漢越音: thậm
Read it as thậm, very or extreme; the top looks like 甘 sweet, as in excessively sweet.
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それは甚だ残念だ。 (それははなはだざんねんだ)
That is extremely regrettable.