He is known to be a benign supervisor.
Let's posit our situation to the benign camp director.
Benign (harmless, inoffensive) is an adjective, not an adverb. A sentence using the adverb, benignly. "He smiled benignly at the bullies, knowing that he would have his revenge on them in a few hours."
Luckily, the tumor was benign.
The term that means not life-threatening is "benign."
he was a little benign
"we were so happy to find out that John's tumour was benign"Luckily, the tumor was benign.
A paper cut may be benign to one's health, but a cut from rusty steel is more likely to become infected. The earlier benign treatment of the American colonies was seemingly replaced by arbitrary taxation and repression.
I have several harmless, or benign moles on my skin.
The tumor was benign; it was not harmful for now.
the people elected the Parliament for the parliamentary democracy (i know its not the best sentence but its still a sentence using the term)
It is entirely possible to write a sentence using the term 'it is'.
no