"I mean "dress" like the long thing women wear, not the verb.
Also, how do I say "I need X" (if X is a noun)"
a) dress:
As Sam said.
b) I need X
In spoken Farsi I would say:
i) I need an X.
یه (=یک) ایکس لازم دارم
مثال: یه دفتر لازم دارم
ii) I need two/three/some Xs.
دو/سه/چند تا ایکس لازم دارم
مثال: 3تا دفتر لازم دارم
iii) I need 'X' (and not Y or Z, in which case the stress of the sentence is on X).
ایکس لازم دارم
مثال: دفتر لازم دارم