Yes. Adverbs describe verbs and many end in -LY. it is not to be confused with an adjective, which describes a noun or pronoun.
Regrettable, just as you have it.
No, it is an adverb. Events that occur "unfortunately" are those that negatively affect individuals or locales ("Unfortunately, the storm passed directly over the state.")
The root word of "regrettable" is "regret."
The tragedies of the past have left a deep and profoundly regrettable legacy of suffering.
regret
A state of affairs is the current set of circumstances, so a regrettable state of affairs would be disappointment with the current set of circumstances.
Regrettable talk is a conversation that takes place without thinking and then the person is sorry they said those things. This often happens in the heat of the moment.
Forgettable Resettable Unforgettable
Well, isn't that a lovely word, "regrettable"? The stressed vowel here is the second "e" - reGRETtable. Just like adding a touch of bright color to a painting, giving emphasis to that syllable can bring a sense of balance and harmony to the word. Remember, there are no mistakes in language, just happy little accidents waiting to be corrected.
they are both regrettable episodes in human history
1. Adverb Of Time2. Adverb Of Place3. Adverb Of Manner4. Adverb Of Degree of Quantity5. Adverb Of Frequency6. Interrogative Adverb7. Relative Adverb
"Ever" is an adverb.