Roundup: Can you put together the pieces of these puzzle-ing mysteries? For years, the most beloved part of my personal library was my two-volume set of the Oxford English Dictionary (“the OED,” to word nerds everywhere). Poring over its tissue-thin pages, tracing a word’s etymology, scouring a follow-up entry then another and another, realizing hours later I’d fallen down a logophile’s rabbit hole. Bliss. As a result of this obsession I love to read puzzle ...

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