WordNet sense 1 (lacking physical strength or vitality):

decrepit, feeble, infirm, rickety, sapless, weak, weakly, debile

WordNet sense 2 (having the attributes of man as opposed to e.g. divine beings):

fallible, imperfect

WordNet sense 3 (having human form or attributes as opposed to those of animals or divine beings):

human

WordNet sense 4 (easily broken or damaged or destroyed):

delicate, fragile