Alright, here is a context clues worksheet on the verb fathom, which is used both intransitively and transitively.
Inasmuch as this can mean “to penetrate and come to understand,” it is a learning word students probably ought to know and be able to use.
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.