Sentence:  This argument also does Sweden, her king, and Chancellor Oxenstierna a regrettable historical injustice, for it trivializes the <WSD>gape-mouthed</WSD> surprise with which most European statesmen greeted the initial successes of the Swedish invaders in 1631. 
Meaning of the word marked with <WSD> tags:  Overwhelmed with awe or astonishment.