auxiliary

n. 辅助者, 辅助物, 附属机构, 助动词
a. 辅助的, 备用的
【医】 辅助的, 副的

名词复数:auxiliaries 

aux.il.ia.ry

adj.Abbr. aux.,auxil.（形容词）缩写 aux.,auxil.
Giving assistance or support; helping.
辅助的：给予帮助或支持的；帮助的
Acting as a subsidiary; supplementary:
从属的：作为附属物的；附属的：
例句：
the main library and its auxiliary branches.
主要图书馆及其从属分支机构

Held in or used as a reserve:
后备的，备用的：保存或用于储备的：
例句：
auxiliary troops; an auxiliary power generator.
后备军队；后备的发动机

Nautical Equipped with a motor as well as sails.
【航海】 机帆船：同时装备有帆和发动机的
Grammar Of, relating to, or being an auxiliary verb.
【语法】 助动词的：属于、关于或作为助动词的
n.（名词）
【复数】 aux.il.ia.ries 缩写 aux.,auxil.
An individual or a group that assists or functions in a supporting capacity:
自愿服务者：起辅助作用的个人或团体：
例句：
a volunteers` auxiliary at a hospital.
医院里的自愿服务团体

A member of a foreign body of troops serving a country in war.
外国援军：战时在他国服役的外国军队之一员
Grammar An auxiliary verb.
【语法】 助动词
Nautical
【航海】
A sailing vessel equipped with a motor.
机帆船：装备有发动机的帆船
A vessel, such as a supply ship or a tug, that is designed for and used in instances and services other than combat.
辅助性的船只：指补给船或供给船，主要用于辅助及服务而非战事

来源：
Middle English
中古英语
from Latin auxili3rius
源自 拉丁语 auxili3rius
from auxilium [help] * see aug-
源自 auxilium [帮助] *参见 aug-