adventitious

adj (fml 文) not planned; accidental 未经计划的; 偶然的: an adventitious occurrence 偶发事件.

adult, adulterate, adulterated, adulteration, adulterer, adulterous, adultery, adulthood, adumbrate, adumbration, adv., advance, advance payment, advanced, advancement, advantage, advantageous, advantageously, advent, Adventist, adventure, adventure playground, adventurer, adventurous, adventurously, adverb, adverbial, adverbially, adversary, adverse, adversely, adversity, advert, advertise, advertise for, advertisement, advertiser, advertising, advertize, advice,