second
n.— «From time to time, he engages friends who double as trainers, or “seconds” as they are called in chess parlance. These seconds are players of reasonable playing strength who, ahead of important competitions, study various openings and select positions aimed at preparing the one who would engage them.» —“ King Anand” by Rakesh Rao Frontline (Chennai, India) Oct. 6-19, 2007. (source: Double-Tongued Dictionary)
Further reading
Have you ever googled your own name and found someone else who goes by the very same moniker? There’s a word for that: googleganger. Plus, the language of hobbyists and enthusiasts: If you’re a beekeeper, perhaps you call yourself a...
The autocomplete function on your phone comes in handy, of course. But is it changing the way we write and how linguists study language? Also, suppose you could invite any two authors, living or dead, to dinner. Who’s on your guest list and...