quick
noun
any area of the body that is highly sensitive to pain (as the flesh underneath the skin or a fingernail or toenail)
adjective
accomplished rapidly and without delay
“was quick to make friends”
“his quick reaction prevented an accident”
Synonymsspeedyhurried and brief
“paid a flying visit”
“took a flying glance at the book”
moving quickly and lightly
“sleek and agile as a gymnast”
“as nimble as a deer”
apprehending and responding with speed and sensitivity
“a quick mind”
“a ready wit”
Synonymsreadyperformed with little or no delay
“an immediate reply to my letter”
“a prompt reply”
easily aroused or excited
“a quick temper”
“a warm temper”
Synonymswarm
adverb
with little or no delay
“the rescue squad arrived promptly”
“come here, quick!”
Source: WordNet 3.1, Princeton University