alder

n tree of the birch family, usu growing in marshy places 桤木（桦木科, 通常生长於沼泽地带）.

alarm, alarm clock (also alarm), alarmed, alarming, alarmist, alas, Alaska, albatross, albeit, Albert Einstein, albino, album, albumen, albumin, alchemist, alchemy, alcohol, alcoholic, alcoholism, alcove, alderman, aldermanic, ale, alehouse, alert, alertly, alertness, alfalfa, alfresco, algae, algebra, algebraic, algebraically, Algeria, Algerian, ALGOL, algorithm, alias, alibi, alien,