ك و س

Probably from كَأْس (kaʔs).

ك و س • (k-w-s)

1. related to losing the ability to stand

• Form I: كَاسَ (kāsa, “to walk with one foot less; to coil oneself up; to prostrate, to cut down the standing firmly of, to throw head over heels; to beat down, to abate the price offered by in haggling with”)
  • Verbal noun: كَوْس (kaws)
  • Active participle: كَائِس (kāʔis)
  • Passive participle: مَكُوس (makūs)
• Form II: كَوَّسَ (kawwasa, “to prostrate, to cut down the standing firmly of, to throw head over heels, to make lie inverse”)
  • Verbal noun: تَكْوِيس (takwīs)
  • Active participle: مُكَوِّس (mukawwis)
  • Passive participle: مُكَوَّس (mukawwas)
• Form IV: أَكَاسَ (ʔakāsa, “to prostrate, to cut down the standing firmly of, to throw head over heels, to make lie inverse; to make walk even though there is one foot less”)
  • Verbal noun: إِكَاسَة (ʔikāsa)
  • Active participle: مُكِيس (mukīs)
  • Passive participle: مُكَاس (mukās)
• Form V: تَكَوَّسَ (takawwasa, “to be prostrated, to have the standing firmly cut down, to be thrown head over heels, to be made lie inverse”)
  • Verbal noun: تَكَوُّس (takawwus)
  • Active participle: مُتَكَوِّس (mutakawwis)
• Form VIII: اِكْتَاسَ (iktāsa, “to retain from performing”)
  • Verbal noun: اِكْتِيَاس (iktiyās)
  • Active participle: مُكْتَاس (muktās)
  • Passive participle: مُكْتَاس (muktās)

• Freytag, Georg (1837) “ك و س”, in Lexicon arabico-latinum praesertim ex Djeuharii Firuzabadiique et aliorum Arabum operibus adhibitis Golii quoque et aliorum libris confectum‎ (in Latin), volume 4, Halle: C. A. Schwetschke, page 70
• Kazimirski, Albin de Biberstein (1860) “ك و س”, in Dictionnaire arabe-français contenant toutes les racines de la langue arabe, leurs dérivés, tant dans l’idiome vulgaire que dans l’idiome littéral, ainsi que les dialectes d’Alger et de Maroc‎ (in French), volume 2, Paris: Maisonneuve et C^ie, page 943
• Steingass, Francis Joseph (1884) “ك و س”, in The Student's Arabic–English Dictionary‎, London: W.H. Allen, page 900