concrete  a.实在的，具体的
          n.混凝土

与cre,cres,cret有关的英文单词≈to make(制造，生产)；to grow(生长；增长)

concrete = con-(=com（=together）一起)+ crete(=to grow生长)= 使不同质的物体长在一起的材料 →  a.实在的，具体的  n.混凝土
 
That new concrete building is an abomination.

那座新混凝土建筑是个讨厌的东西。

词形变化
副词: concretely 名词: concreteness
动词过去式: concreted 动词过去分词: concreted
动词现在分词: concreting 动词第三人称单数: concretes

词义辨析
concrete, specific
这两个形容词均含“具体的”之意。
concrete: 指通过感官能看到、听到、触到的具体东西。其反义词是abstract。
specific: 侧重指具体的细节，是与general(一般)，vague(模糊)相对的具体。

英英解释
名词 concrete:a
strong hard building material composed of sand and gravel and cement and water
动词 concrete:
cover with cement
form into a solid mass; coalesce
形容词 concrete:
capable of being perceived by the senses; not abstract or imaginary
formed by the coalescence of particles