Some words to know

On Rebuttal
There are many words giveng the meaning argument. One of them is rebuttal which forms from the verb rebut that means refute an opinion. The word contend means to say something is true in an argument. When the argument turns into hot debate and the opposite parties are in the sate of anger then it is called contention. Sometimes, when two parties debate in the form of compitition then it is called rivalry. Another word is fence which is used when you start throwing words to each others.

Disclaim
It's a verb which means to state publicly that you have no knowledge of something or that you are not responsible for something. In this sense its synonym becomes deny. Similarly, the secondary meaning of disclaim is to give up your right to something such as proprty or title. In this sense it analoguous word becomes renounce. 

Convalesce
To spend time getting your health and strength back after illness. She is convalescing at home after her operetion; Doctor had said that the convalescence period for Laxmi would be 18 months.

Discomfit
To make somebody feel confused or embarrassed. The noun form of discomfit is discomfiture. He was clearly taking delight in her discomfiture.
A good teacher never makes her children feel discomfiture.

Discompose
To disturb somebody and make them feel anxious. Synonyms for this is disconcert or disturb. It is also discombobulated, however, the slight nuance is that if one is discombobulated then he is not only confused but also annoyed.

Disconcert
To make somebody feel anxious, confused or embarrassed. His answer rather disconcerted her.

Discretion
The word discretion means freedom of power to decide what should be done in a particular situation. The synonymous phrases are prudence in speech, actions; ability to decide responsibility; and freedom to act on one's own. "I will leave it up to you to use your own discretion. How much to tell terminally ill patients is left to the discretion of the doctor. Nepali Congress leaves the decision of selecting CC members at the discretion of party president."

Discursive
A style of writing or speaking moving from one point to the other without any strict structures. "I remorsed for being discursive in the last meeting."
Synonym: digression, rembling

Disdain
Contempt. The feeling that somebody or something is not good enough to deserve your respect or attention. Disdainful - contemptuous

Disembark
To leave a vehicle, especially a ship or an aircraft, at the end of journery. Go ashorre; upload cargo from a ship. "Before the passengers could disembark they had to pick their passport from the ship's pursure.

Disfigure
To spoil the appereance of a person, thing or place. "Her face was disfigured by a long red scare; Kali's face was disfigured by poto but now the black patch of her face has been completely removed."

Disgorge
Cause or allow a solid substance; To flow or run out or over; vomit.

Disgruntle
Make discontented; "The passangers were disgruntled by numerous delays".

Disingenuous
Not ingenuous; not sincere, especially when you pretend to know less about something than you really do. "It would be disingeneus of me to claim I had never seen it"

Disinter
To dig up something, especially from the dead from the ground. Opposite - inter
Many cadavers intered in different parts of the counter were disintered after democracy"

Disparate
Basically different or unrelated

Dispassionate
Not influenced by emotion. " A dispassionate observer" Synonym - impartial

Dispel
To make something, especially a feeling or belief, go away or disappear. "His speech dispelled any fears about his health". ''