Lead is unquestionably heavier than an equal volume of feathers.
She was unquestionably the victor.
Seeing as unquestionably starts with a vowel, U, you should use 'an' before it.
This word is an adverb.
Unquestionably Mrs. Jarley had an inventive genius.
She has a retentive memory, able to remember even the smallest details of past events.
If you mean by word "unquestionably".
use it by saying- how can you use the word ebullient in a sentence?
Can you use the word concluding in a sentence? Done.
Studying gerontology has helped me understand the aging process and how to provide better care for older adults.
How can you use the word infectious in a sentence
You can use the word Truss in a sentence like this.
Just use it! Or do you mean, can you use the word beheld in a sentence.