Of persons or animals, their limbs or organs: Lacking strength, weak, infirm. Now implying an extreme degree of weakness, and suggesting either pity…

figurative. Having no distinctive character, vividness, or intensity; lacking in interest; bland.

That flags; hanging down, drooping; failing, languid.

Having no pith (literal and figurative).

? Colourless, feeble; or ? perverted. Obsolete.

figurative. Destitute of keenness or ‘edge’; not biting or corrosive; also figurative.

Of an argument, literary work, etc.: lacking a clear point or denouement; not direct, incisive or witty. Now somewhat rare.

figurative. (Cf. unsinew, v. 1b.)

Unsatisfying to the mind or soul; dull, flat, insipid, bald, dry, uninteresting; meagre, scanty, thin, poor; wanting in substance or solidity…

Not refined or elevated in tone or character; lacking sophistication; of low or ordinary quality. Cf. earlier high-pitched, adj. 1.

(un-, prefix1 affix 1.)

figurative. Lacking in substance. Obsolete.

Of immaterial things: Wanting vigour and nervous energy, limp, feeble.

Not sinewy, weak, nerveless.

(un-, prefix1 affix 2.)

Not cogent; without force.

Without point or force; ineffective; without purpose, advantage, or utility.

Of style, writing, an idea, etc.: prosaic, insipid, or lifeless; mundane, lacking force or interest.

of artistic style, etc.

(un-, prefix1 affix 2.)

Nerveless, feeble.

Loose from emptiness; not filled out or plump; shrunken, spare; flabby, hollow. of immaterial things. Also figurative. Obsolete.

Lacking force or power.

Of literary or artistic style: diffuse, insipid, lifeless.

Not strong or energetic in action; lacking in force or power. Of words or expressions: Wanting in force, inadequate; implying relatively little…

Of language, character, etc.: Weak, wanting ‘back-bone’; nerveless, feeble.

Having no substance or solidity; sloppy, feeble, trifling.

figurative. Of verse: that rhymes or jingles. Of speech or language: empty, idle, senseless. Of a speaker: that uses language of this type. Now rare.

Bloodless, wanting blood; anæmic.

Shaking, trembling, jittery; in a state of nervous agitation. Also: of a nervous or sensitive disposition. Also figurative.

figurative. Slovenly, careless. Of statements, arguments, etc., or of writers in respect of these.

(under-, prefix1 affix 5(a).)

Without or lacking a shaft (in any sense of the noun).

figurative. Deficient in substance or quality; poor; unsubstantial. Of immaterial things: Wanting in fulness, breadth, force, or vigour; scanty…

Not accented or stressed; unemphasized.

Characteristic of a ‘wimp’; feeble, ineffectual; snivelling. Frequently of persons.

attributive passing into adj.: = wimpish, adj.