To convince someone is to make them believe you.
I believe the word you mean is "bellybutton," and it means the navel, which is said to resemble a button on one's belly.
The word emissary is a noun, and means someone who is sent on a special mission, typically involving diplomacy. The word emissary does not have an antonym.
It's a made up name to make fun of someone that likes to snitch, narc, tattle, tell on others etc.
Disturb.
Corroborative is the hardest word in the world to make a sentence for.
pretend
Convinced
Con
Yes, reassuring is a real word. Assuring is to make someone believe that what you are saying is true, usually through action. The prefix 'Re-' means, to do again, so if you are assuring someone again you are making certain that they believe you. To reassure someone of something is to say or do something that will remove their doubts and fears.
Annoy or agitate
I believe you are thinking of the word scorn. The definition of the word scorn means to make a mockery.
I believe the word "Van" is Danish and means "of". As in Someone"of" Somewhere.
There is no such word as 'convience'. The definition of the word 'convince' is to either make someone believe that a lie you are telling them is the truth or persuade someone to do something.
I don't believe that there is a specific word for it, but I would recommend saying 'to sap one's concentration'.
The word is credo from which we get the word creed.
The word convinced can be an adjective and a verb. The adjective form means to be in a state of believing. The verb form is the past tense of the verb "convince" which means to make someone believe something.
Another word that means missing someone is pining. The word pining means to deeply yearn for or to suffer with longing for someone.