忽こつ焉えん

taru-adjective, adverb taking the 'to' particle

suddenly; unexpectedly

Literary, classical-style adverb/adjective describing something happening abruptly. Often used with と (忽焉として). Cross-referenced with 忽然 (こつぜん), which is more common in modern Japanese.

See also: 忽然

• 忽こつ焉えんとして風かぜが止やみ、あたりは静せい寂じゃくに包つつまれた。

  Suddenly the wind stopped, and the area was enveloped in silence.