aloft         ad. 在高处,在上  

at or to a great height 

aloft<>affinity  

founder <> stay aloft   

grounded <> aloft

aloof         a. 疏远的,冷淡的 

removed or distant either physically or emotionally 

politic : offend :: aloof : associate

gregarious <> aloof

alphabetical  a.字母(表)的，ABC的 

arranged in the order of the letters of the alphabet

dictionary : alphabetical :: annals : chronological

altruism      n. 利他主义，不自私 

unselfish regard for or devotion to the welfare of others     

altruism <>egocentric

amalgamate    v. 合并，混合

to merge into a single body    

amalgamate <> separate/isolate

amass         v.积聚

to collect for oneself : ACCUMULATE      

ambiguous     a.模棱两可的；分歧的

doubtful or uncertain especially from obscurity or indistinctness 

ambiguous : clarity :: mendacious : truth   

ambiguous : understand :: blatant : ignore   

equivocation:ambiguous::platitude:banal

watershed  <> ambiguity

ambivalent    a. 矛盾的,好恶相克的

a : continual fluctuation (as between one thing and its opposite) 

b : uncertainty as to which approach to follow

ambivalent <> commitment

amble         vi. 缓行,溜蹄

a leisurely walk 

walk : amble :: talk : chat    

ambrosial     a. 特别美味的

something extremely pleasing to taste or smell  

mellifluous : music :: ambrosial : food