VERBS

be, look
become, get, turn
when the weather turns frosty
remain, stay

ADV

very

PHRASES

cold and frosty
The day dawned cold and frosty

VERBS

be, look, seem
become, turn
He cool green eyes became positively frosty
remain

ADV

decidedly, distinctly, positively, very
The atmosphere in the room was decidedly frosty
pretty