concrete

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。

名词 concrete:

1. a strong hard building material composed of sand and gravel and cement and water

动词 concrete:

1. cover with cement
2. form into a solid mass; coalesce

形容词 concrete:

1. capable of being perceived by the senses; not abstract or imaginary
2. formed by the coalescence of particles

1. That new concrete building is an abomination.
   那座新混凝土建筑是个讨厌的东西。
2. The concrete walls are reinforced with steel rods.
   混凝土墙是用钢筋加固的。
3. We need a hoist to lift the concrete blocks.
   我们需要一台起重机来吊起混凝土块。
4. The bare concrete floor was cold on my feet.
   水泥地没铺地毯，我的脚感到很凉。
5. Have you any concrete thoughts on how to deal with this difficulty?
   处理这种困难你有什么具体的想法？
6. The workman is still busy concreting the road.
   工人还在忙着用混凝土铺路。
7. This post is made of concrete.
   这根柱子是混凝土做的。

con.crete

adj.（形容词）
Of or relating to an actual, specific thing or instance; particular:
具体的：实际的、特定的事物或事例的，或与之有关的；具体的：
例句：
had the concrete evidence needed to convict.
需要有具体的证据来判定有罪

Existing in reality or in real experience; perceptible by the senses; real:
真实的：在现实或真实经历中存在的；感觉能察觉到的；真实的：
例句：
concrete objects such as trees.
实存的物体，如树木等

Of or relating to a material thing or group of things as opposed to an abstraction.
有形的：与一实质事物或一组物体有关的，与抽象的对称
Formed by the coalescence of separate particles or parts into one mass; solid.
凝固的：通过将各分离的部分结合在一起形成的；坚固的
Made of hard, strong, conglomerate construction material.
混制的：用坚硬、结实的混合建筑材料制成的
n.（名词）

Abbr. conc.A hard, strong construction material consisting of sand, conglomerate gravel, pebbles, broken stone, or slag in a mortar or cement matrix.
缩写 conc.混凝土：一种用沙子、石灰、卵石、碎石等制成的坚硬、结实的建筑材料
A mass formed by the coalescence of particles.
用石灰等制成的块体
v.（动词）
con.cret.ed,con.cret.ing,con.cretes[kôn.krôt., kông.-, kôn-krôt., kông-]
v.tr.（及物动词）
To build, treat, or cover with hard, strong conglomerate construction material.
凝结物：用结实的混凝土建造，处理，或覆盖
To form into a mass by coalescence or cohesion of particles or parts.
用各分离的部分混合成的大块
v.intr.（不及物动词）
To harden; solidify.
硬化；固化

来源：
Middle English concret
中古英语 concret
from Latin concrôtus [past participle of] concrôscere [to grow together, harden]
源自 拉丁语 concrôtus [] concrôscere的过去分词 [结合，硬化]
com- [com-]
com- [前缀，表.结合.]
crôscere [to grow] * see ker- 2
crôscere [生长] *参见 ker- 2

【引伸】
concrete.ly
adv.（副词）
concrete.ness
n.（名词）