Translation guide
Describes something that cannot be attacked, questioned, or defeated. In Japanese, this concept is expressed through various adjectives and set phrases depending on whether you mean a physical fortress, an argument, a reputation, or a lead in a game.
Describing a fortress, position, or defense that cannot be successfully attacked.
A four-character compound literally meaning 'hard to attack, never falls'. Used for impregnable fortresses or defenses.
その城は難攻不落だった。
That castle was unassailable.
Literally 'golden castle, iron wall'. A more literary term for an impregnable fortress.
金城鉄壁の守りを誇る。
It boasts an unassailable defense.
Describing an argument, position, or evidence that cannot be successfully challenged.
A phrase meaning 'there is no room for counterargument'. Very natural for unassailable logic or evidence.
彼の主張は反論の余地がない。
His argument is unassailable.
Means 'unshakable' or 'firm'. Used for unassailable beliefs, trust, or evidence.
揺るぎない証拠がある。
There is unassailable evidence.
Means 'firm' or 'steadfast'. Often used for unassailable positions or determination.
確固たる立場を取る。
Take an unassailable stance.
Literally 'no gap to exploit'. Used when an argument or position leaves no weak points.
彼の理論は付け入る隙がない。
His theory is unassailable.
Describing a lead, record, or position that cannot be overcome.
Means 'rock-solid'. Often used for an unassailable lead or position in sports or business.
盤石のリードを保つ。
Maintain an unassailable lead.
Means 'immovable'. Used for an unassailable top position or ranking.
不動の首位を守る。
Defend an unassailable first place.
Describing a reputation or moral standing that cannot be tarnished.
Literally 'cannot be damaged'. Used for an unassailable reputation.
彼の評判は傷つけられない。
His reputation is unassailable.
Means 'flawless' or 'nothing to criticize'. Can be used for an unassailable character or work.
彼の人格は非の打ち所がない。
His character is unassailable.