Retreat. Withdraw.
The word retract means to take back, to draw back, to draw in. To retract means to take something back. It means to reject a formerly held belief, usually while under pressure.
To "Dike" is to move back suddenly.
A word that means to depart suddenly is "plump" or "plumped"
Unfortunately, the word "retrick" is not actually a word, as it is not in the dictionary. However, you may be referring to the word "retrack" which means to draw back within itself.
The word you are looking for is "interject," which means to interrupt a conversation with a sudden or sharp remark.
Yes, suddenly is an adverb. It means occurring in a sudden or expected manner.
jerk
unsudden
Such a word might be 'shied'.
To draw back the bowstring.
exclaim, ejaculate, blurt,
photograhpy