無力|むりょくmuryoku[1]atamadaka (head-high)

1. na-adjective, no-adjectivepowerlessness; helplessness; incompetence; ineffectiveness
   「おまえの軍ぐんなど我わが軍ぐんに対たいしては無力むりょくだよ」と、彼かれは笑わらっていった。↗

   "Your army is impotent against mine!!" he laughed.

• Synonym非力ひりきNeutralA na-adjective for lacking physical strength or ability, as in 「非力な腕」; it centers on bodily weakness rather than helplessness in a situation.
• Synonym無能むのうNeutralA na-adjective for being incompetent or unfit for a role, as in 「無能な上司」; it is pejorative and judges a person's ability, not helplessness.
• Synonym無能力むのうりょくWrittenA noun for lacking ability, also the legal term for incapacity; it leans toward written and formal usage.
• Related弱いよわいNeutralThe everyday adjective for being weak or not good at something, as in 「酒に弱い」; far broader in use than 「無力」 and covers general weakness.
• Related甲斐なしかいなしWrittenA written, old-fashioned phrase meaning futile or useless; rare in modern usage, and about pointlessness rather than lacking power.
• Antonym有力ゆうりょくNeutralA na-adjective for being influential or promising; the direct opposite of 「無力」.
• Antonym強力きょうりょくNeutralA na-adjective for being strong and powerful, as in 「強力な薬」; it stands opposite to 「無力」.
• Antonym有能ゆうのうNeutralA na-adjective for being capable and competent, as in 「有能な人材」; it is the opposite of 「無能」 rather than of 「無力」.

Use 「無力」 for being powerless in a situation, as in 「無力感」 or 「自分の無力さ」. Pick 「非力」 for weak physical strength, 「無能」 for incompetence, and 「弱い」 for general weakness. Opposites: 「有力」 influential, 「強力」 powerful, 「有能」 capable.

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

1. 能力のうりょく・体力たいりょく・勢力せいりょく・財力ざいりょくなどの力ちからがないこと。またはそのさま。