by ill hap
by ill luck
impolitically
impoliticly
in adverse circumstances
inadvisably
inappropriately
inaptly
inauspiciously
incongruously
inconveniently
ineptly
inexpediently
infelicitously
inopportunely
regrettably
sadly
undesirably
unfavorably
unfittingly
unhappily
unluckily
unpromisingly
unpropitiously
unprovidentially
unseasonably
unsuitably
fortunately
luckily