 
<translate> Isi ọwụwa bụ oké ihe mgbu n'isi. Ịṅụ oké mmanya na-akpata akpịrị ịkpọ nkụ. Ọrịa ọgbụgbọ na-akpata isi ọwụwa. Ya mere, azịza ya bụ isi ọwụwa. <eng> Headache is a severe pain in the head. Heavy drinking causes hangover. Hangover causes headache.
Therefore, the answer is headache. 