Sardonically means mockingly humorous. She spoke sardonically to the poor man, then turned away.
Sardonically is the adverb form of sardonic, an adjective meaning derisive mocking, cynical and bitter. To do something sardonically would mean scornfully or sarcastically. Example sentence: He sardonically thanked the customer service rep who could not provide satisfaction.
Out to get someone
The man had a sardonic grin on his face. Professor Snape had a sardonic smirk on his face after Harry melted his cauldron.
A good way to use retentive in a sentence is... "How do you use the word retentive in a sentence?"
use it by saying- how can you use the word ebullient in a sentence?
Can you use the word concluding in a sentence? Done.
How do you use the word gerontology in a sentence?
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.
You can use an underscore to remove a word out of a sentence. It can be placed where the word was.
Since that is not a word I would not attempt to use it in a sentence.