a.
1.
Defective, imperfect, impaired, decayed, rotten.
2.
Diseased, sickly, weakly, poorly, infirm, unhealthy, morbid, feeble.
3.
Erroneous, wrong, false, fallacious, incorrect, deceitful, sophistical, illogical, defective, untenable, invalid, unsubstantial, faulty, hollow.
4.
Deceitful, dishonest, untrustworthy.
5.
Insincere, false, unfaithful, untrue.
6.
Questionable, defective.
7.
Disturbed, light.
8.
Thin, weak.
9.
Insubstantial, unreal.
10.
Heterodox, heretical, unorthodox, defective.