| 短兵急 | impetuousness |
| 売り急ぐ | to sell in haste |
| 息急き切る | to pant, to gasp |
| 焦眉の急 | urgent need |
応急手当を施す 応急手当てを施す | to give (a person) first-aid, to administer first aid |
| 急な流れ | swiftly running river, rapid stream |
| 急迫した | urgent, pressing, imminent |
| 急を救う | to help (a person) out of danger |
| 急カーブ | sharp curve (turn) |
| 亜急性 | subacute, subacute illness |
| 応急修理 | temporary repairs |
| 急行停車駅 | express station |
| 急行料金 | express charge |
| 急行列車 | express train |
| 急降下爆撃 | dive bombing |
| 緊急措置 | emergency measures, urgent countermeasures |
| 緊急対策 | emergency measures, urgent countermeasures |
| 緊急逮捕 | arrest without warrant |
| 緊急発進 | scrambling, scramble |
| 急展開 | rapid development |
| 急冷 | rapid cooling |
| 応急処置 | temporary repairs, stop-gap treatment, first-aid treatment |
| 牙関緊急 | trismus, lockjaw |
| 先を急ぐ | to hurry, to hasten |
| 急斜面 | steep slope |
| 重症急性呼吸器症候群 | severe acute respiratory syndrome, SARS |
| 急性感染症 | acute infection |
| 急成長企業 | rapidly growing company |
| 救急医療 | emergency medicine |
| 緊急救命室 | emergency room, ER, casualty department |
| 緊急時環境線量情報予測システム | System for Prediction of Environmental Emergency Dose Information, SPEEDI |
| 緊急通報 | emergency call |
| 緊急浮上 | emergency ascent (submarine), emergency surfacing |
| 緊急浮上訓練 | emergency surfacing drill (submarine) |
| 緊急部隊 | rapid force |
| 緊急炉心冷却装置 | emergency core cooling system, ECCS |
| 急かせる | to hurry up |
| 急がせる | to hasten (the work), to urge (a person) on |
| 急く | to hurry, to rush |
| 救急患者 | emergency patient, emergency case |
| 緩急自在 | varying the tempo or speed (of something) at will |
| 一旦緩急 | (when) danger threatens, should an emergency occur |
| 急転悪化 | suddenly turning for the worse, sudden deterioration |
| 短慮性急 | short-tempered and impatient |
| 不要不急 | nonessential and nonurgent |
| 国際緊急援助隊 | international disaster relief team, international emergency aid unit |
| 急所 | vital point (critical place to make a move in the game of Go) |
| 救命救急センター | emergency and critical care centre (center) |
| 急所を突く | to touch the vital point |
| 急角度 | steep angle, acute angle |
| 急転回 | abrupt turn, sudden change |
| 急テンポ | fast tempo |
| 緊急電話 | urgent phone call, emergency phone call |
| 風雲急を告げる | to have grown tense (of a situation), to have become critical (and to be on the verge of a major upheaval) |
急場をしのぐ 急場を凌ぐ | to use a stopgap measure to cope with an emergency |
| 救急搬送 | emergency transport, ambulance transport |