Sentence:  Zadeh's claim is that if the meaning of an expression (X) can be modeling by a fuzzy membership function variable, then the meaning of an expression such as “very X” is simply a membership function over the same variable determined by applying a <WSD>unary</WSD> operator to the membership function for X. 
Meaning of the word marked with <WSD> tags:  Of an operation, function, procedure(,) or logic gate, taking exactly one operand, argument, parameter(,) or input; having domain of dimension 1.