Frighteningly

Etymology
From frightening + -ly

Adverb

 * 1) In a frightening or terrifying manner.
 * 2) Very; beyond usual expectation so as to cause surprise or concern.
 * The pitcher that was set before me was frighteningly large.

Translations

 * Russian: пуга́юще (pugajusche)

Synonyms

 * (in a frightening manner): terrifyingly
 * (beyond usual expectation): surprisingly

frighteningly