| adjective | wanting in physical strength “a weak pillar” |
| adjective | overly diluted; thin and insipid “washy coffee” |
| adjective | (used of vowels or syllables) pronounced with little or no stress “a syllable that ends in a short vowel is a light syllable” |
| adjective | wanting in moral strength, courage, or will; having the attributes of man as opposed to e.g. divine beings “I'm only a fallible human” |
| adjective | tending downward in price “a weak market for oil stocks” |
| adjective | deficient or lacking in some skill “he's weak in spelling” |
| adjective | lacking bodily or muscular strength or vitality “a feeble old woman” |
| adjective | (used of verbs) having standard (or regular) inflection |
| adjective | not having authority, political strength, or governing power “a weak president” |
| adjective | deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc “a faint outline” |
| adjective | likely to fail under stress or pressure “the weak link in the chain” |
| adjective | deficient in intelligence or mental power “a weak mind” |
| weakness | noun | the property of lacking physical or mental strength; liability to failure under pressure or stress or strain |
| wateriness | noun | meagerness or poorness connoted by a superfluity of water (in a literary style as well as in a food) |
| imperfectness | noun | the state or an instance of being imperfect |
| debility | noun | the state of being weak in health or body (especially from old age) |
| feebleness | noun | the state of being weak in health or body (especially from old age) |
| infirmity | noun | the state of being weak in health or body (especially from old age) |
| faintness | noun | barely audible |