一いっ石せき返がえしMeanings1nounreversing a single stone (Othello)A technical term in the board game Othello/Reversi, referring to the act of flipping exactly one opponent's stone in a turn.一いっ石せき返がえしでじわじわと形けい勢せいを有ゆう利りにした。He gradually gained an advantage by reversing single stones.
