Adverb
dismayingly (comparative more dismayingly, superlative most dismayingly)
In a manner that causes dismay.
Although my mood swings were the logical and deterministic results of my inputs, they were dismayingly hard for me to foresee, let alone control. Rudy Rucker
Saturday is a dismayingly bad book. The numerous set pieces-brain operations, squash game, the encounters with Baxter, etc. John Banville