Quietly; not in a manner inclined to speaking.(adverb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "taciturnly" in a sentence
"Then How-ha's eyes went blear as she traversed the simple windings of her own brain, inspecting the bare shelves taciturnly stored with the impressions of a meagre life."
"His convictions upon all subjects were taciturnly inflexible."
"Mrs. Cliffe retired quite taciturnly, nothing in her face responding to this rallying, and he bent quickly over Marion."