eldest

a.最年长的，最老的；排行第一的

elaboration, elan, eland, elapse, elastic, elastic band, elasticate, elasticity, Elastoplast, elate, elated, elatedly, elation, elbow, elbow-grease, elbow-room, elder, elder statesman, elderberry, elderly, eldorado, elect, election, electioneering, elective, elector, electoral, electorate, electr(o)-, electric, electric blanket, electric eye, electric field, electric razor, electric shock, electric storm, electrical, electrically, electrician, electricity,