Answer:

stoutest

Answer	Crossword Clue
STOUTEST	Unsurpassed in corpulence
STOUTEST	Most weighty
STOUTEST	Most thickset

STOUTEST	Most corpulent
STOUTEST	Firmest.
STOUTEST	Most brave.
STOUTEST	Most rugged.
STOUTEST	Most valiant.
STOUTEST	Most dauntless
STOUTEST	Most valiant

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.