強大|きょうだいkyoudai[0]heiban (flat)

1. na-adjective, nounpowerful; strong; mighty
   強大きょうだいな権力けんりょくを有ゆうする大国たいこくが存在そんざいする限かぎり、戦争せんそうは避さけ難がたい。↗

   As long as there are sovereign nations possessing great power, war is inevitable.

• Synonym強力きょうりょくNeutralRefers to strength or potency of a force or effect, as in 「強力な薬」; 「強大」 covers not just strength but also large scale and influence.
• SynonymパワフルNeutralA loanword with a colloquial feel for being full of energy and drive; used mostly of people and machines.
• Related強いつよいNeutralThe most common general word for strong, covering the body, will, ability and more; 「強大」 adds the sense of large scale or influence.
• Related有力ゆうりょくNeutralMeans influential or promising, as in 「有力候補」; the weight is on influence and likelihood rather than raw strength or size.
• Related強烈きょうれつNeutralDescribes intense stimulation or a strong impression, as in 「強烈な光」; it stresses the impact felt, not power or scale.
• Related力強いちからづよいNeutralDescribes something brimming with strength, as in 「力強い声」; it stresses vigor and momentum, often with an uplifting or reassuring feel.
• Related屈強くっきょうWrittenA written, formal word for a strong, sturdy physique, mostly of men, as in 「屈強な男」; it describes bodies, not power or scale.
• Related精強せいきょうWrittenA written word for elite, formidable military units, as in 「精強な部隊」; it implies both top quality and strength.
• Antonym弱小じゃくしょうNeutralThe direct antonym: weak and small, lacking both the power and the scale that 「強大」 implies.
• Antonym脆弱ぜいじゃくNeutralMeans fragile and easily damaged; it stands opposite to 「強大」 but stresses fragility rather than lack of size.

Use 「強大」 for something strong and large in scale, as in 「強大な国家」「強大な力」. For strong effects pick 「強力」, for general use 「強い」, for sturdy bodies the written word 「屈強」. 「パワフル」 is colloquial energy, 「有力」 influence or likelihood, 「強烈」 intensity, 「力強い」 vigor, 「精強」 written for elite troops; the opposite of 「強大」 is 「弱小」, while 「脆弱」 means fragile.

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

1. 強つよくて大おおきいこと。