• (RP, America) IPA: /ˈɹæpɪd/

rapid

1. Very swift or quick.

   a rapid stream;  rapid growth;  rapid improvement

   • 1667, John Milton, “Book 6”, in Paradise Lost. A Poem Written in Ten Books, London: Printed [by Samuel Simmons], and are to be sold by Peter Parker […] [a]nd by Robert Boulter […] [a]nd Matthias Walker, […], OCLC 228722708 ↗; republished as Paradise Lost in Ten Books: The Text Exactly Reproduced from the First Edition of 1667: […], London: Basil Montagu Pickering […], 1873, OCLC 230729554 ↗:

     Ascend my Chariot; guide the rapid Wheeles.

2. Steep, changing altitude quickly. (of a slope)
3. Needing only a brief exposure time. (of a lens, plate, film, etc.)
4. (England, dialectal) Violent, severe.
5. (obsolete, dialectal) Happy.

• French: rapide
• German: schnell
• Italian: rapido
• Portuguese: rápido
• Russian: бы́стрый
• Spanish: rápido

rapid

1. (archaic or colloquial) Rapidly.

rapid (plural rapids)

1. (often, in the plural) a rough section of a river or stream which is difficult to navigate due to the swift and turbulent motion of the water.
2. (dated) A burst of rapid fire.

• French: rapides
• German: Stromschnelle
• Italian: rapida, cataratta
• Portuguese: corredeira
• Russian: стремни́на
• Spanish: rápido, rabión

• rapt