n.

1. 境况；困境，苦境[C][S1]
   He was in a sad plight, sick and penniless.

   他贫病交加，处境十分困难。

   Seeing the people's plight, he knelt down and prayed.

   看到人民的困境，他跪下祈祷。

vt.

1. 发誓；保证
   his plighted word

   他的誓言

n.

1. 誓约；婚约[C]

n.

v.

1. solemnly pledge or promise (faith or loyalty).
2. (be plighted to) be engaged to be married to.