WordNet sense 1 (lacking help):

unassisted

WordNet sense 2 (having no protecting or concealing cover):

defenseless

WordNet sense 3 (devoid of elaboration or diminution or concealment; bare and pure):

raw

WordNet sense 4 (open and observable; not secret or hidden):

open, overt

WordNet sense 5 (lacking its natural or customary covering):

bare

WordNet sense 6 (not wearing clothing):

unclothed