obligate

动词 obligate:

1. force or compel somebody to do something
   同义词：compel, oblige
2. commit in order to fulfill an obligation
3. bind by an obligation; cause to be indebted
   同义词：oblige, bind, hold

形容词 obligate:

1. restricted to a particular condition of life

1. He felt obligated to help.
   他觉得有责任予以帮助。
2. We were obligated to attend the opening ceremony.
   我们有必要参加开幕式。

ob.li.gate

v.tr.（及物动词）
ob.li.gat.ed,ob.li.gat.ing,ob.li.gates
To bind, compel, or constrain by a social, legal, or moral tie.See Synonyms at force
使负有责任或义务：被社会、法律或道德约束所束缚，强制或限制参见 force
To cause to be grateful or indebted; oblige.
使…感激或感谢；施恩惠于
To commit (money, for example) in order to fulfill an obligation.
承担（如，钱）以履行义务
adj.（形容词）

Biology Able to exist or survive only in a particular environment or by assuming a particular role:
【生物学】 专性的，固性的：只能在一种特定环境下或通过承担一种特定角色而存在或生存的：
例句：
an obligate parasite; an obligate anaerobe.
专性寄生虫；专性厌氧生物

Absolutely indispensable; essential.
必不可少的；根本的

来源：
Latin oblig3re oblig3t- * see oblige
拉丁语 oblig3re oblig3t- *参见 oblige

【引伸】
ob.ligable
ob.ligately
adv.（副词）
ob.liga.tor
n.（名词）