Question

Give the meaning of:
Whereof it is born

Answer 1

This phrase means that he does not know the origin.

This portrays Antonio's doubt about the origin of his sadness.

Antonio disagrees with Salerio and Salanio who have assessed that something is wrong with him.

Antonio knows it is the truth but does not understand his own self.

There is a constant conflict that is eating him, and in very ornamental terms, Shakespeare portrays the origin and nature of melancholy here.

Answer 2

answer of merchant of Venice meaning how it originated