背地 bui³ dei⁶ {bèi dì}

1. secretly
2. in private
3. behind someone's back

背地風〔--风〕 bui³ dei⁶ fung¹ {bèi dì fēng}

1. behind sb's back
2. privately
3. on the sly

背地裡〔--里〕 bui³ dei⁶ leoi⁵ {bèi dì li}

behind sb's back