효도孝道 filial piety 효자孝子 filial son; devoted son 충효忠孝 loyalty and filial piety 효孝 filial piety; filial duty 효녀孝女 filial daughter; devoted daughter 효부孝婦 virtuous daughter-in-law; filial daughter-in-law 효성孝誠 filial devotion 효심孝心 filial piety; devotion to parents 효행孝行 filial piety 반포지효反哺之孝 being extremely devoted to one's parents 불효不孝 not being filial 불효자不孝子 undutiful child; unfilial child