非力|ひりきhiriki[0]heiban (flat)

1. na-adjective, nounpowerless; weak; lacking physical strength
2. na-adjective, nounincompetent; lacking ability; powerless

• Synonym無力むりょくNeutralLacking power or ability to act, or having no effect on something, as in 「無力感」; stronger in tone than 「非力」.
• Synonym弱いよわいNeutralThe most common, everyday adjective for weak, with the broadest range of use; more colloquial than 「非力」.
• Related脆弱ぜいじゃくNeutralFrail and easily broken, used of systems, structures and foundations, and also of poor health; 「非力」 is about lacking strength.
• Related無能むのうNeutralIncompetent or good-for-nothing, with a negative nuance; concerns lack of ability rather than physical strength.
• Antonym強力きょうりょくNeutralPowerful, with great strength; the direct opposite of 「非力」 as a lack of physical strength.
• Antonym有力ゆうりょくNeutralInfluential or a strong candidate; the opposite of powerless 「非力」.

「非力」 means lacking strength or ability and often serves as the humble phrase 「非力ながら」. For having no power or effect use 「無力」; for everyday weak use 「弱い」. 「脆弱」 is fragility, 「無能」 incompetence; 「強力」 and 「有力」 are antonyms.

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

1. 体力たいりょくが弱よわいさま。
2. 力量りきりょうなどが乏とぼしいこと。
3. 権力けんりょくや勢力せいりょくなどの力ちからが弱よわいこと。