急【きゅう】
sudden, abrupt, unexpected, urgent, pressing, steep, sharp, precipitous, rapid, swift, fast, emergency, crisis, danger, urgency, hurrying, haste, (in gagaku or noh) end of a song
急速【きゅうそく】
rapid (e.g. progress)
急性【きゅうせい】
acute (illness)
急激【きゅうげき】
sudden, abrupt, rapid, sharp, drastic, radical
急増【きゅうぞう】
rapid increase, proliferation, surge, explosion
救急【きゅうきゅう】
first-aid, emergency (aid)
特急【とっきゅう】
limited express (train for which a limited-express ticket is required), limited express (train making a limited no. of stops), great hurry
救急車【きゅうきゅうしゃ】
ambulance
緩急【かんきゅう】
high and low speed, fast and slow, pace, tempo, lenience and severity, emergency, crisis, dire situation
性急【せいきゅう】
hasty, rash, rushed, hurried, impatient, impetuous, quick-tempered
急行【きゅうこう】
hurrying (to somewhere), rushing, hastening, express (train)
急ぐ【いそぐ】
to hurry, to rush, to hasten, to make something happen sooner
至急【しきゅう】
urgent, pressing, immediate, prompt, express, urgently, promptly, at once, right away, without delay, as soon as possible
急病【きゅうびょう】
sudden illness
急変【きゅうへん】
sudden turn, sudden change, (suddenly occurring) accident, emergency
急逝【きゅうせい】
sudden death
急所【きゅうしょ】
vital part (of the body), tender spot, weak point, vitals, key point, essential point, crux (of a problem), heart (of a matter), male crotch (as a target in fighting)
急患【きゅうかん】
emergency case
危急【ききゅう】
emergency, crisis, imminent danger, Vulnerable (conservation status), VU
超特急【ちょうとっきゅう】
super express