weak

Sense 1 adjective

wanting in physical strength

a weak pillar

Sense 2 adjective

overly diluted; thin and insipid

washy coffee

Sense 3 adjective

(used of vowels or syllables) pronounced with little or no stress

a syllable that ends in a short vowel is a light syllable

Sense 4 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

Sense 5 adjective

tending downward in price

a weak market for oil stocks

Sense 6 adjective

deficient or lacking in some skill

he's weak in spelling

Sense 7 adjective

lacking bodily or muscular strength or vitality

a feeble old woman

Sense 8 adjective

(used of verbs) having standard (or regular) inflection

Sense 9 adjective

not having authority, political strength, or governing power

a weak president

Sense 10 adjective

deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc

a faint outline

Sense 11 adjective

likely to fail under stress or pressure

the weak link in the chain

Sense 12 adjective

deficient in intelligence or mental power

a weak mind