rudiment

n 1 rudiments [pl] ~s (of sth) (a) basic or elementary principles (of a subject) （某一学科的）基础, 基本原理: master the rudiments of economics 精通经济学的基本原理. (b) imperfect beginning of sth that is not yet fully developed 初级形态: working on the rudiments of a new idea 研究一种新思想的萌芽. 2 [C] part or organ that is incompletely developed 未充分发展的部分; 发育不成熟的器官: the rudiment(s) of a tail 未完全发育的尾巴.

rubella, Rubicon, rubicund, rubric, ruby, ruby wedding, RUC, ruche, ruched, ruck, rucksack, ruckus, ructions, rudder, ruddily, ruddiness, ruddy, rude, rudely, rudeness, rudimentary, rue, rueful, ruefully, ruefulness, ruff, ruffian, ruffle, rug, Rugby, Rugby League, Rugby Union, rugged, ruggedly, ruggedness, rugger, ruin, ruination, ruined, ruinous,