Answer:

nonchalant

Answer	Crossword Clue
NONCHALANT	Careless?
NONCHALANT	Unruffled
NONCHALANT	Cool

NONCHALANT	Casual
NONCHALANT	Cool.
NONCHALANT	Unconcerned.
NONCHALANT	Casually indifferent.
NONCHALANT	Casual; detached
NONCHALANT	Calm

Crossword

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