挨家挨户 āijiā-āihù to go from house to house
How to remember 挨家挨户: 挨 next to + 家 home + 户 door = to go from house to house.
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How it is used
- Door to door, house by house - 志愿者挨家挨户宣传 (zhìyuànzhě āijiā-āihù xuānchuán) volunteers spread the word from house to house.
- Used adverbially for systematic canvassing. Note 挨 is āi (close by) here, not ái (to suffer).