vt. 使负义务, 强使, 使感激, 施恩惠于

a. 有责任的, 必须的

[医] 专性的, 固性的, 必需的

Obligate \Ob"li*gate\, v. t. [imp. & p. p. {Obligated}; p. pr. &
vb. n. {Obligating}.] [L. obligatus, p. p. of obligare. See
{Oblige}.]
1. To bring or place under obligation, moral or legal; to
hold by a constraining motive. ``Obligated by a sense of
duty.'' --Proudfit.

That's your true plan -- to obligate
The present ministers of state. --Churchill.

2. To bind or firmly hold to an act; to compel; to constrain;
to bind to any act of duty or courtesy by a formal pledge.

That they may not incline or be obligated to any
vile or lowly occupations. --Landor.