What is another word for "weak"?

Roget's Thesaurus (1911) lists these synonyms for "weak": add, affuse, affusion, and, aqua, aquatic, aqueous, are, bald, balneal, balneation, bath, bathe, bland, blandness, careless, childish, cold, colorless, dabble, deluge, diffuse, diluent, dilute, diluted, dilution, dip, douche, douse, drench, drown, dry, duck, dull, fade, feeble, feebleness, flat, flatulent, flood.