Kwai dai wani ruwan sinadarin halittane wanda wasu halittu sukeyi musanman nau'in tsuntsaye, macizai, ƙwari, da wasu dayawa daga dabbobin ruwa kifi da sauransu. Samfarin ƙwai dai mulmulalle ne kuma yawancin kwasfarsa nada karfi musamman na tuntsaye banda na wasu ƙwari. Kamar kifi kuwa nashi nada laushi da kyankyaso da dai sauran su. Dabbobinda keyin kwai suna yinshine lokaci bayan lokaci, akwai wadanda kuma koshi nasa suyi kamar agwagwa ta turawa tanayin kwaine lokacin sanyi da damina amma idan zata dinga samun koshi wanda ya wuce daidainta to zata dingayin kwai. To ammafa shi wannan nau'in ƙwan saidai aci domin baya ƙyanƙasuwa saboda ƙoshi yakawoshi ba barbaraba.