If I must, I’ll stipulate that because it is not necessarily a word high schoolers must know before they graduate, this context clues on the adjective and adverb asunder, which was Merriam-Webster’s Word of the day a few days back.
Yet, if students want, at some point in their lives, to do something like write their own wedding vows (or understand vows another person wrote for them), then it might be good to have this word at hand.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.