No, don't answer.
( No ( , ( ( ( do n't ) answer ) . ) ) )
(ROOT (S (INTJ (UH No)) (, ,) (VP (VB do) (RB n't) (VP (VB answer))) (. .)))
Don't say a word. 
( ( ( Do n't ) ( say ( a word ) ) ) . )
(ROOT (S (VP (VB Do) (RB n't) (VP (VB say) (NP (DT a) (NN word)))) (. .)))