weak

Deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc.

“weak colors”

“a weak pulse”

Tending downward in price.

“a weak market for oil stocks”

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

Wanting in physical strength.

“a weak pillar”

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

“a weak stress on the second syllable”

Overly diluted; thin and insipid.

“weak tea”

Wanting in moral strength, courage, or will; having the attributes of man as opposed to e.g. divine beings.

Lacking bodily or muscular strength or vitality.

Deficient in intelligence or mental power.

“a weak mind”

Deficient or lacking in some skill.

“he's weak in spelling”

Likely to fail under stress or pressure.

“the weak link in the chain”

Not having authority, political strength, or governing power.

“a weak president”