a.
1.
Feeble, languid, weekly.
2.
Sickly, debilitated, unhealthy, unsound, infirm, tender, valetudinary, valetudinarian, invalid, frail, delicate, fragile.
3.
Defenceless, unguarded, exposed, unprotected.
4.
Soft, pliant.
5.
Pliable, pusillanimous, easily influenced, without any backbone, irresolute.
6.
Shallow, simple, silly, senseless, witless, stupid, foolish, childish, imbecile.
7.
Unwise, injudicious.
8.
Indiscreet, erring, peccable, foolish, imprudent.
9.
Feeble.
10.
Low, faint, small, feeble, piping, womanish.
11.
Thin, watery, diluted, waterish, insipid, tasteless.
12.
Sleazy, flimsy, slight, poor, trifling, feeble, frivolous.
13.
Poor, inconclusive, unconvincing, unsatisfactory, lame, illogical, vague.
14.
Accessible, assailable, vulnerable.
15.
Unsustained, unsupported.
16.
Ineffective, inefficient, inefficacious.
17.
Unsound, unsafe, untrustworthy, frail, unsubstantial.
18.
Infirm, unstable, unsteady, undecided, wavering, unsettled.
19.
Ineffectual.
20.
Powerless.
21.
Delicate, frail, fragile.
22.
Small, slight, slender, inconsiderable.