competency

n. (opposed to superfluity) moderatemeans of subsistence,enough to live on with comfort（与过分富裕相对）小康生活，吃饱穿暖，足衣足食。
△Mer.1.2.9(8):“superfluity comes sooner by white hairs,butcompetency lives longer.”富贵催人生白发，布衣蔬食易长年。