കച്ച (Malayalam) comes from Hindi कच्चा, from Sauraseni Prakrit 𑀓𑀘𑁆𑀘, from Ashokan Prakrit 𑀓𑀘, from Sanskrit कृत्य, from Sanskrit कृ, from Proto-Indo-European kʷer- — to do; to make; to build.
കച്ച (Malayalam): imprefect, raw