quick

accomplished rapidly and without delay

“was quick to make friends”

“his quick reaction prevented an accident”

“hoped for a speedy resolution of the problem”

“a speedy recovery”

hurried and brief

“paid a flying visit”

“took a flying glance at the book”

“a quick inspection”

“a fast visit”

moving quickly and lightly

“sleek and agile as a gymnast”

“as nimble as a deer”

“nimble fingers”

“quick of foot”

apprehending and responding with speed and sensitivity

“a quick mind”

“a ready wit”

performed with little or no delay

“an immediate reply to my letter”

“a prompt reply”

“was quick to respond”

“a straightaway denial”

easily aroused or excited

“a quick temper”

“a warm temper”

any area of the body that is highly sensitive to pain (as the flesh underneath the skin or a fingernail or toenail)

with little or no delay

“the rescue squad arrived promptly”

“come here, quick!”