無欲恬淡[muyokutentan] indifferent to worldly gain
恬淡[tentan] disinterest
恬然[tenzen] calm

虚無恬淡[kyomutentan] rising above the trivia of life and remaining calm and selfless
恬淡虚無[tentankyomu] rising above the trivia of life and remaining calm and selfless
恬として[tentoshite] nonchalantly

枯淡[kotan] elegant simplicity
淡い[awai] light
淡黄色[tanoushoku] pale yellow
淡紅色[tankoushoku] pink
淡彩[tansai] light colouring

淡水[tansui] fresh water (i.e. not salt water)
淡雪[awayuki] light snowfall
濃淡[noutan] light and shade
濃淡画像[noutangazou] gray-scale image
平淡[heitan] simple