頑強|がんきょうgankyou[0]heiban (flat)

1. na-adjectivestubborn; dogged; persistent; tenacious
   当局とうきょくは地域ちいき住民じゅうみんの頑強がんきょうな抵抗ていこうにあった。↗

   The authorities met with unyielding opposition from the locals.
2. na-adjectivetough; sturdy; hardy; strong
   大男おおおとこが必かならずしも頑強がんきょうだとは限かぎらない。↗

   A big man is not always robust.

• Synonym頑固がんこNeutralSuggests a stubborn personality that ignores advice, often negatively. 「頑強」 is about withstanding pressure without yielding, and can also describe physical toughness.
• Synonym強情ごうじょうNeutralDescribes a personality that insists on its own views and won't back down. 「頑強」 speaks of the stance taken in resistance or defense.
• Synonym一徹いってつNeutralMeans being set in one way and inflexible once decided, as in 「老いの一徹」. 「頑強」 is about not yielding to outside force.
• Synonym意固地いこじNeutralRefers to stubbornly digging in out of pique, as in 「意固地になる」. 「頑強」 describes tenacious resistance, not sulky defiance.
• Synonym意地っ張りいじっぱりCasualColloquial word for a disposition that puts up a front and won't give in, or for such a person. Unlike 「頑強」, it can't describe resistance or physique.
• Synonym頑固一徹がんこいってつNeutralFour-character word for stubbornly seeing a decision through to the end; describes character. 「頑強」 can also speak of resistance and physical toughness.
• Related強硬きょうこうNeutralDescribes an unyielding, hardline attitude, typically in negotiations or diplomacy, as in 「強硬な姿勢」. 「頑強」 centers on tenacious resistance.
• Related頑迷がんめいWrittenA written/formal word for stubbornness blind to reason, strongly negative. 「頑強」 implies nothing unreasonable.
• Antonym脆弱ぜいじゃくWrittenThe opposite of 「頑強」 in its sturdy sense: fragile, easily damaged, unable to take shocks; often used of systems and foundations. Mostly written/formal.
• Antonym弱々しいよわよわしいNeutralThe opposite of 「頑強」 in its strong, vigorous sense: looking weak and feeble. Often describes people, voices, or appearances.

Use 「頑強」 for withstanding pressure without yielding or for physical toughness, as in 「頑強に抵抗する」. For a stubborn personality choose 「頑固」 or its kin (「強情」「一徹」「意地っ張り」); for a hardline stance in negotiations, 「強硬」. The opposite of the sturdy sense is 「脆弱」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 自分じぶんの考かんがえや主張しゅちょう、陣地じんちなどを固かたく守まもって容易よういに屈くっしないさま。
2. がっしりと丈夫じょうぶなさま。