na-adjective, noun
straightforwardness; honesty; purity
Describes a person or character that is sincere, unpretentious, and pure-hearted. Often used in literary or formal contexts.
彼の生一本な性格が多くの人に信頼されている。
His straightforward character is trusted by many people.
生一本な態度で交渉に臨
He approached the negotiations with an honest and sincere attitude.
純粋 means 'pure' in a general sense, including physical purity. 生一本 focuses on moral purity and straightforwardness of character.
Compound of 生 (pure, unadulterated) and 一本 (one straight line), suggesting a single-minded, unswerving purity of character.