ヤンマ

noun

lamenting; lamentation

Rare loanword from German Jammer. In ordinary Japanese, 嘆き or 悲嘆 is usually clearer; ヤンマ is best treated as a specialized or dictionary-register term.

from German Jammer

• 資し料りょうには、ドイツ語ごの Jammer に由ゆ来らいする「ヤンマ（嘆なげき）」と説せつ明めいされている。

  The material explains ヤンマ as 'lamenting,' derived from the German Jammer.