arraign

Where it comes from

From Middle English areynen (“to interrogate, arraign, reprimand”), from Anglo-Norman areiner, arener, from Old French araisnier, areisnier, aresnier (“to speak to, address; accuse (in a law court)”) (whence modern French arraisonner (“to verify cargo, to arraign”)), from Vulgar Latin *arratiōnāre, from Latin adratiōnāre, from ad (“to”) + *ratiōnāre (“to reason, talk reasonably, talk”), from ratiō (“reason, reasoning, discourse”), from rat-, past-participle stem of rērī (“to reckon, calculate”). First attested in the late 14th century. Doublet of areason.

About the -g- within the word, Etymonline and the Merriam-Webster Online Dictionary both agree that it is present by hypercorrection and appears since the 16th century. The Webster’s Revised Unabridged Dictionary (1913) and the Concise Oxford Dictionary of English Etymology (1986) however, provides two etymological links each, which are Old French aragnier and araigner. The Oxford English Dictionary (1885, 1989) did not support either of these hypotheses, but did attribute Old French arraigner, arainer to an unrelated obsolete sense and etymon.