Acute

急性

jíxìng

((medicine) of an abnormal condition of recent or sudden onset)

急性

jíxìng

((medicine) of a short-lived condition)

敏銳 /敏锐

mǐnruì

(intense, sensitive, sharp — see also intense, sensitive, sharp)

激烈

jīliè

(intense, sensitive, sharp — see also intense, sensitive, sharp)

锐角

ruìjiǎo

((geometry) of an angle: less than 90 degrees)