先せん

noun which may take the genitive case particle 'no', noun

former; previous; old

Used as a noun or no-adjective to refer to something that came before, such as a previous job, address, or version. Often contrasts with 現 (げん, current) or 新 (しん, new).

• 先せんの社しゃ長ちょうはとても厳きびしかった。

  The former president was very strict.

• 先せんの住じゅう所しょから新あたらしい住じゅう所しょに変へん更こうしました。

  I changed from my previous address to a new one.

noun

first move; opening move

Used in board games like go and shogi to refer to the first move or opening play. Often appears in phrases like 先を打つ or 先手.

• 将しょう棋ぎでは、先せんを取とるのが有ゆう利りだ。

  In shogi, taking the first move is advantageous.