negligent, neglectful, careless
Inherited from Ottoman Turkish اهمالكار (ihmālkâr, “negligent, careless”), from اهمال (ihmāl, “neglect, negligence”), morphologically Arabic إِهْمَال (ʔihmāl) + Persian کار (kâr), verbal noun of أَهْمَلَ (ʔahmala, “to neglect”), equivalent to ihmal + -kâr.
Practice speaking and memorizing "ihmalkâr" and many other words and sentences in Turkish.