Fromback +‎stroke.

• (US)IPA^(key):/ˈbækˌstɹoʊk/

• Audio(US):

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backstroke (pluralbackstrokes)

1. Abackhandedstroke orblow.
   • 1755, Miguel de Cervantes, translated byTobias Smollett,Don Quixote, Volume 1, I.1:

     He observed that Cid Ruy-dias was an excellent knight; but not equal to the Lord of the Flaming-sword, who with oneback-stroke[translatingrevés] had cut two fierce and monstrous giants through the middle.

2. (swimming) Astroke swum lying on one'sback, while rotating botharms through the water as topropel the swimmerbackwards.
3. (bellringing) Thepull on thetail of therope that swings thebell through a full circle (comparehandstroke)

• back crawl

• backstroker

• breaststroke
• butterfly stroke
• sidestroke

backstroke (third-person singular simple presentbackstrokes,present participlebackstroking,simple past and past participlebackstroked)

1. Toswim the backstroke.

• front crawl
• freestyle
• medley
• trudgen