戶口本

household register / household registration booklet / residence certificate

a household / door / family

population (counted as number of households for census or taxation) / registered residence / residence permit / (in Hong Kong and Macau) bank account

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls

root / stem / origin / source / this / the current / original / inherent / originally / classifier for books, periodicals, files etc