Answer:

steelier

Answer	Crossword Clue
STEELIER	More obdurate
STEELIER	More hardened, as a gaze
STEELIER	More firm.

STEELIER	More flintlike.
STEELIER	More adamant
STEELIER	Harder
STEELIER	More intense, as a stare
STEELIER	Stronger and harder
STEELIER	Relatively severe
STEELIER	More resolute

Crossword

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