The term "most widestretching" can be broken down into two parts: "widestretching" and "most". To find antonyms for "widestretching", we can look for words that mean the opposite of "wide" and "stretching". Some possibilities include "narrow", "contracting", "shortening", and "tightening". For "most", antonyms can include "least", "scant", "insufficient", or "inadequate". Therefore, some antonyms for "most widestretching" could be "least narrow", "scant shortening", or "inadequate tightening". These words would describe something that is not as extensively wide and stretched as something referred to as "most widestretching.