acknowledge v.承认 [ac+KNOWLEDGE]
acme n.顶点;极至 [Gk, = highest point]
acoustics n.声学;传音性 [acoustic 听觉的;有关声音的]
acquaint v.告之;使熟悉 [ac+quiant知道=cognit come to know ACQUAINTANCE 熟人]
acquiescence n.默许的;顺从的 [ac+quiesce安静+nce;aquiescent顺从的 quiescent静止的]
acquisition n.获得;得到 [ACQUIRE acquisitive 贪得的;物质欲重的 requisite 必须品 acquisitiveness 渴望占有]
acquittal n.开释
acrid a.辛辣的;尖刻的 [irreg
acrimonious a.尖酸的 [ACRIMONY 尖刻;剧烈]
acrophobia n.高处恐怖症 [acro=akron+PHOBIA]
activate v.使活动
actuarial a.保险统计(员)的 [ACTUAL actuary 保险公司计算员;法庭记录(员) actuate 激励]
actuate v.激励;促使 [ACTUAL]
acuminate a.锐利的;有尖头的 [L acuminatus pointed: ACUMEN]
acute a.灵敏的;急性的 [L acutus pp. of acuere sharpen
adage n.格言 [adagium ad+age]
adamant a.坚定不移的;固执的 [a+damant=daamao驯服]
adapt v.使适合 [ad+apt=aptus适合 adaptable有适应能力的 aptitude能力]
addendum n.补遗;追加物 [L, gerundive of addere ADD]
addiction n.沉迷;热中 [ADDICT ad+dict;addictive 使人上瘾的]
additive a.添加剂 [LL additivus: ADD]
addle a.混乱的;糊涂的 [addled头脑混乱的]