- 弱い【よわい】 - weak, frail, delicate, tender, unskilled, weak (wine) 
- 弱点【じゃくてん】 - weak point, weakness, shortcoming, defect, flaw, sore spot, tender spot 
- 弱る【よわる】 - to weaken, to grow weak, to wane, to decline (of one's health), to be downcast, to be dejected, to be dispirited, to be troubled, to be at a loss, to be perplexed, to be annoyed 
- 弱み【よわみ】 - (a) weakness, shortcoming, failing, sore point 
- 弱虫【よわむし】 - coward, weakling, scaredy cat, wimp, sissy 
- 弱気【よわき】 - timid, weak-kneed, fainthearted, bearish (e.g. market) 
- 病弱【びょうじゃく】 - weak (constitution), sickly, feeble, in poor health 
- 貧弱【ひんじゃく】 - poor, meagre, meager, feeble, scanty, shabby, insubstantial 
- 弱まる【よわまる】 - to abate, to weaken, to be emaciated, to be dejected, to be perplexed 
- 弱める【よわめる】 - to weaken 
- 弱音【よわね】 - feeble complaint, whine 
- 脆弱【ぜいじゃく】 - weak, frail, fragile 
- 薄弱【はくじゃく】 - feebleness, weakness, weak 
- 強弱【きょうじゃく】 - strength and weakness, (degree of) strength, stress (of a sound), loudness 
- 軟弱【なんじゃく】 - weakness 
- 弱腰【よわごし】 - weak attitude 
- 弱者【じゃくしゃ】 - weak person, the weak, vulnerable person, disadvantaged person 
- 弱体【じゃくたい】 - weak (organization, organisation) 
- 虚弱【きょじゃく】 - feebleness, weakness, imbecility 
- 弱冠【じゃっかん】 - twenty years of age, youth, early age, tender age of ...