Given the following passage  "International tribunals and arbiters are often called upon to resolve substantial disputes over treaty interpretations. To establish the meaning in context, these judicial bodies may review the preparatory work from the negotiation and drafting of the treaty as well as the final, signed treaty itself.",  answer the following question. Note that the answer is present within the text.  Question: The Latin substantialis was used to derive what English word meaning of considerable importance?
Answer:
substantial