Here are some ways to introduce the concept of a plighted word:
Formal:
* "A plighted word is a solemn promise, binding the speaker to an oath or obligation."
* "The plighted word carries the weight of honor and integrity, demanding unwavering adherence."
Informal:
* "A plighted word means you're stuck with it! It's a promise you can't break."
* "Back in the day, a plighted word was as good as gold. It meant you were true to your word, no matter what."
Literary:
* "The knight's plighted word, whispered in the hushed silence of the moonlit forest, was a promise he would forever cherish."
* "Her heart ached with the weight of a plighted word, a burden she knew she couldn't shirk."
Contextual:
* "He gave his plighted word to protect the princess, a promise he intended to keep at any cost."
* "The plighted word, exchanged in the sacred space of the temple, sealed their destinies together."
Overall, the introduction of "plighted word" should convey the solemnity and importance of a promise that demands respect and fulfillment.