ADJ.
all, chilly, expensive, hot
VERB + FRIGHTFULLY
went
PREP.
during
ADV.
quickly
adv
In a frightful manner.
Very, extremely.
It all went frightfully quickly.
"Really!" he said, collapsing into lassitude. "It's too frightfully hot for singing."
adverb — used as intensifiers
I'm frightfully chilly.
It is frightfully expensive.
Tom was frightfully murdered during the last days of the war.