unairworthy
adj 1: not fit to fly [ant: {airworthy}]
From WordNet (r) 3.0 (2006) [wn]:
unrehearsed
adj
with little or no preparation or forethought; "his ad-lib
comments showed poor judgment"; "an extemporaneous piano recital"; "an extemporary lecture"; "an extempore skit"; "an impromptu speech"; "offhand excuses"; "trying to sound offhanded and reassuring"; "an off-the-cuff toast"; "a few unrehearsed comments" Synonym(s):ad-lib, extemporaneous, extemporary, extempore, impromptu, offhand, offhanded, off-the-cuff, unrehearsed
From WordNet (r) 3.0 (2006) [wn]:
unrewarded
adj
having acquired or gained nothing; "the returned from the
negotiations empty-handed" Synonym(s):empty-handed, unrewarded
From WordNet (r) 3.0 (2006) [wn]:
unrewarding
adj
not rewarding; not providing personal satisfaction [ant:
rewarding]