(of public transportation) to stop operation on schedule due to upcoming bad weather

(astrology, collective) the twelve zodiac signs

(idiomatic) to have grown tense (of a situation); to have become critical (and to be on the verge of a major upheaval)

class for special needs

urgent / sudden / hasty / rapid / fast / quick / abrupt / hurry

and / reach out / exert / exercise / cause

(of water) to draw; to scoop; to ladle; to pump / (of feelings) to understand; to consider

(medicine) SARS, Severe Acute Respiratory Syndrome

(medicine) poliomyelitis

(calculus) Riemann sum