The Collaborative International Dictionary
Speechless \Speech"less\, a.
Destitute or deprived of the faculty of speech.
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Not speaking for a time; dumb; mute; silent.
Speechless with wonder, and half dead with fear.
--Addison. [1913 Webster] -- Speech"less*ly, adv. -- Speech"less*ness, n.
Wiktionary
adv. In a speechless manner; without speaking.
WordNet
adv. without speaking; "he stood up soundlessly and speechlessly and glided across the hallway and through a door"
Usage examples of "speechlessly".
They both looked down at the great wound in his side, and watched speechlessly as the flesh and bone and skin knitted themselves seamlessly together until there was no trace of the wound left.
Lionstone sat speechlessly on her Throne, looking at the headless corpse lying at her feet.
Yes, there is death in this business of whaling--a speechlessly quick chaotic bundling of a man into Eternity.
Hesitantly, she walked to the long narrow mirror in the corner of her room and gazed speechlessly at her image.
Here, among his many boxes labelled with transcendent names, lives Mr. Tulkinghorn, when not speechlessly at home in country-houses where the great ones of the earth are bored to death.
Hiccupping somewhere between laughter and tears, Aramina speechlessly patted Heth's muzzle.
The younger witch sidled speechlessly into the room, face beetroot red, arms held behind her back.
They arose in the dank dawn out of a sleep without rest to quietly assume the previous day's languid positions in the boat, gazing speechlessly like sated connoisseurs upon mile after absolute mile of bursting, shrieking, pullulating redundancy, verdure without beginning or end, the moss-backed primordial crowded up against yesterday's tender birth, the same random elements combined, recombined in a ceaseless round of genesis and collapse.
They all stared at him, speechlessly wondering how the Synod could not so regard itself in the face of its disastrous strategic position.