The adverb is always, it is an adverb of frequency
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No, "deny" is a verb that means to refuse to admit the truth of something or to refuse to allow or accept something. It is not an adverb.
"Truly" is an adverb, not a preposition. It is used to emphasize the truth or accuracy of a statement or claim.
Actually is an adverb.
"Actually" is an adverb. It is commonly used to indicate reality or truth, or to add emphasis or contrast in a sentence.
Never always speak the truth
According to Hindu belief system it is a sin not to speak truth. Truth is also known as (satyam)
Not always.
the adjective is good.
The adverb form of the word truth is truthfully.
We would quickly have no friends.
The noun in the sentence is truth.
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in most cases yes but if it is absolutly nessesary then its ok but it should be for the right reasons and not to just benifit yourself.
tell the truth
No it is not, nor does harm come to everyone that speaks it. It is not always diplomatic, sensible or kind to speak the truth at all times.
Because the main foundation of Hinduism is based on 4 Vedas. Which teach a man Truthfulness (satyam) as an essential part of his lifestyle.