say it: GAYMZ-muhn-ship
gamesmanship is a noun meaning "the use of dubious (although not technically illegal) methods to win a game". It carries one recorded sense.
the use of dubious (although not technically illegal) methods to win a game
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for gamesmanship come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.