cord

string, rope, line, cord, thread, wire

这些名词均含“线”之意。
string: 普通用词，指捆绑小件物品的细绳或细带子。
rope: 指用于捆绑大物件的粗壮而坚固的绳子，一般用绵、毛、麻、金属或其它材料制成。
line: 普通用词，含义广泛，指任何一种线，常作引申用。
cord: 指比string粗，比rope细，较牢固，通常用于捆扎较小物品的线或绳。用作引申当约束讲。
thread: 普通用词，指用棉、毛、丝或纤维等纹成的很细的线，通常用于缝纫、纺织等。
wire: 专指用金属制成的线。

名词 cord:

1. a line made of twisted fibers or threads
2. a unit of amount of wood cut for burning; 128 cubic feet
3. a light insulated conductor for household use
   同义词：electric cord
4. a cut pile fabric with vertical ribs; usually made of cotton
   同义词：corduroy

动词 cord:

1. stack in cords
2. bind or tie with a cord

1. A leather loop that slides to change the tension on the cord of a drum.
   滑动皮环通过滑动以改变鼓弦张力的皮环
2. The dancer could kick over a cord four feet from the ground.
   这位舞蹈家能把脚举到离地4英尺的绳索上面。
3. Material, such as cord or thread, used to lash or bind parts.
   用来抽打的绳索用于鞭笞或捆缚部件的材料，如线或绳
4. He tied the package with a cord.
   他用绳子把包裹扎紧。

cord

n.（名词）
A slender length of flexible material usually made of twisted strands or fibers and used to bind, tie, connect, or support.
绳，索：通常用数条搓成的线或纤维制成的一种细长灵活的材料，用于系物、捆扎、联结或支撑
An insulated, flexible electric wire fitted with a plug or plugs.
塞绳：一种绝缘的可移动电线，接有一个或多个插头
A hangman`s rope.
绞索：刽子手用的绳子
An influence, feeling, or force that binds or restrains; a bond or tie.
约束，束缚：一种约束或限制的影响、感情或力量；约束或束缚
Also chord also [kôrd] Anatomy A long ropelike structure, such as a nerve or tendon:
也作 chord 也作 [kôrd] 【解剖学】 索：长的，类似绳子的解剖结构，如神经或腱：
例句：
a spinal cord.
脊髓

A raised rib on the surface of cloth.
绒条：布面上起绒的棱条
A fabric or cloth with such ribs.
灯芯绒类布：有这种绒条的织物或布匹
cords Trousers made of corduroy.
cords 灯芯绒裤：灯芯绒做的裤子
Abbr. cd.A unit of quantity for cut fuel wood, equal to a stack measuring 4 × 4 × 8 feet or 28 cubic feet (3.'2 cubic meters).
缩写 cd.考得：木材堆的体积单位，等于4×4×8英尺或28立方英尺（3.'2立方米）的堆
v.tr.（及物动词）
cord.ed,cord.ing,cords
To fasten or bind with a cord.
捆绑：用绳子固定或联结
To furnish with a cord.
用绳装备
To pile (wood) in cords.
成捆堆积（如木材）

来源：
Middle English
中古英语
from Old French corde
源自 古法语 corde
from Latin chorda
源自 拉丁语 chorda
from Greek khordô * see gher…-
源自 希腊语 khordô *参见 gher…-

【引伸】
cord.er
n.（名词）