important
... 吃紧 in short supplydiretensecriticalimportant 打紧 important 恶性通货膨胀 hyperinflation ...
matter
... shake v.& n. 摆荡;奶昔 matter v.& n. 重要;打紧;工作 maybe adv. 兴许;梗概 ...
hammer up ; hammer hard
never mind ; it doesn't matter ; not serious ; unimportant
hardened up and secured
打紧,拼音dǎ jǐn,要紧,重要;紧急时刻;实在,真的。