WordNet sense 1 (not the same one or ones already mentioned or implied):

other

WordNet sense 2 ((of a new kind or fashion) gratuitously new):

newfangled

WordNet sense 3 (being or productive of something fresh and unusual; or being as first made or thought of):

original

WordNet sense 4 (being in its early stage):

young

WordNet sense 5 (being used or worked for the first time):

virgin

WordNet sense 6 (not yet put into use):

unused

WordNet sense 7 (not yet proved or subjected to testing):

untested, untried

WordNet sense 8 (being new in a time not long past):

recent

WordNet sense 9 (pleasantly new or different):

novel, refreshing

WordNet sense 10 (having just or recently arisen or come into existence):

newborn

WordNet sense 11 ((of a cycle) beginning or occurring again):

fresh

WordNet sense 12 (conspicuously new):

brand-new, brand-new

WordNet sense 13 (lacking training or experience):

raw

WordNet sense 14 (lacking practical experience or training):

inexperienced, inexperient

WordNet sense 15 (used of a living language; being the current stage in its development):

modern

WordNet sense 16 (of a later stage in the development of a language or literature; used especially of dead languages):

late

WordNet sense 17 (having no previous example or precedent or parallel):

unexampled

WordNet sense 18 (very recently):

freshly, newly, recently

WordNet sense 19 (not habituated to; unfamiliar with):

unaccustomed