WordNet sense 1 (just barely adequate or within a lower limit):

marginal

WordNet sense 2 (not having a protective covering):

unsheathed

WordNet sense 3 (apart from anything else; without additions or modifications):

mere, simple

WordNet sense 4 (not elaborate or elaborated; simple):

plain

WordNet sense 5 (lacking a surface finish such as paint):

unfinished

WordNet sense 6 (not having a coat of paint or badly in need of a fresh coat):

unpainted

WordNet sense 7 (without the natural or usual covering):

bald, denudate

WordNet sense 8 (providing no shelter or sustenance):

barren, bleak, desolate, stark, desolate

WordNet sense 9 (unfavorable to life or growth):

inhospitable

WordNet sense 10 (having everything extraneous removed including contents):

stripped

WordNet sense 11 (holding or containing nothing):

empty

WordNet sense 12 (make public):

air, publicize, publicise

WordNet sense 13 (lay bare):

denude, strip

WordNet sense 14 (lacking in amplitude or quantity):

scanty, spare

WordNet sense 15 (deficient in amount or quality or extent):

meager, meagerly, stingy, scrimpy, stingy

WordNet sense 16 (lacking embellishment or ornamentation):

unembellished, unornamented

WordNet sense 17 (not decorated with something to increase its beauty or distinction):

unadorned, undecorated