【根】cre＝to make（制造），to grow（生長）

recruit
To engage (persons) for military service.
To strengthen or raise (an armed force) by enlistment.
To supply with new members or employees.
To enroll or seek to enroll: colleges recruiting minority students.
To replenish.
A newly engaged member of a military force, especially one of the lowest rank or grade.
A new member of an organization or body.
n. 招聘；新兵；新成員
vt. 補充；聘用；征募；使…恢復健康
vi. 征募新兵；得到補充；恢復健康

例句:
The wartime cabinet first recruited men into the forces from non-essential industries.
戰時內閣首先從非重點工業中招募人員補充武裝力量。
Many young peasants were recruited into the coal mining industry.
煤炭工業中雇用了很多年輕的農民。

concrete
made of concrete
based on facts, not on ideas or guesses
a concrete object is one that you can see and feel
building material that is made by mixing together CEMENT, sand, small stones and water
~ sth (over) to cover sth with concrete
adj. 混凝土的；實在的，具體的；有形的
vi. 凝結
vt. 使凝固；用混凝土修筑
n. 凝結物;具體物

短語:
in the concrete 在實際領域內；實際上；具體地

例句:
The word "apple" is a concrete noun.
"蘋果"是個具體名詞。
The workmen are still busy concreting the road.
工人們仍忙著用混凝土鋪路。
She is interested in art concreted with nature.
她對與自然融合的藝術很感興趣。

recreate
to refresh by means of relaxation and enjoyment, as restore physically or mentally.
to take recreation.
vt. (尤指在工作后)使得到消遣(或娛樂)
vi. 消遣;娛樂

例句:
They recreate themselves with playing bridge.
他們以打橋牌作消遣。

recreation
refreshment by means of some pastime, agreeable exercise, or the like.
a pastime, diversion, exercise, or other resource affording relaxation and enjoyment.
n. 娛樂；消遣；休養

crescendo
a gradual increase specifically : a gradual increase in volume of a musical passage
the peak of a gradual increase : CLIMAX <complaints about stifling smog conditions reach a crescendo ― Down Beat> a crescendo musical passage
with an increase in volume ― used as a direction in music
n. 聲音漸增
adv. 漸次加強地
adj. 漸強的
vi. 音量逐漸增強

decrescendo
gradually reducing force or loudness; diminuendo (opposed to crescendo).
a gradual reduction in force or loudness.
a decrescendo passage.
n. 漸弱；漸弱音
adj. 漸弱的
adv. 漸弱地

decrescent
diminishing; decreasing.
waning, as the moon
adj. 變小的；漸減的；虧缺的

decrepit
Weakened, worn out, impaired, or broken down by old age, illness, or hard use. See Synonyms at weak.
adj. 衰老的；破舊的

例句:
A decrepit old man sat on a park bench.
一個衰弱的老人坐在公園的長凳上。