widestmost
Widestmost is a coined adjective and adverb used in informal English to indicate an extreme degree of width within a group or comparison. It is not recognized in major dictionaries and is generally considered nonstandard or jocular.
The word appears to be a blend of standard forms that express width: the superlative widest and
Usage and notes: Because widestmost is nonstandard, it should be avoided in formal writing. In ordinary contexts,
Examples: Among all the doors, this one is the widestmost. The widestmost canyon draws crowds from across
See also: wide, width, widest, superlatives, neologisms, nonce formations.