赶紧

赶紧	gǎn jǐn	hurriedly / without delay
赶	gǎn	to overtake; to catch up with / to hurry; to rush / to try to catch (the bus etc) / to drive (cattle etc) forward; to drive (sb) away / to avail oneself of (an opportunity) / until; by (a certain time)
紧	jǐn	tight / strict / close at hand / near / urgent / tense / hard up / short of money / to tighten