The word recto is to dextrous as the word verso is to what?
Etymology, Etymology, and more Etymology
as well as grammar, usage, euphemism, slang, jargon, semantics (meaning), linguistics, neologism, idiom, word origin, syntax, dialect, lexicon (vocabulary), diction, pidgin, synonym, antonym, homonym, cant, argot, lingo, and redundancy.

The critically-acclaimed board game MooT consists of tough questions about the nuances of the English language.
Answer: sinister
Right-side pages are recto pages (typically odd-numbered) and left-side pages are verso pages(typically even-numbered). Etymology-wise, right-handers are dextrous and left-handers are sinister.
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