early
inopportune
a bit previous
advanced
arrested
back
backward
bad
behindhand
belated
blocked
delayed
delayed-action
detained
far ahead
forward
futile
half-baked
half-cocked
hasty
held up
hung up
ill-adapted
ill-advised
ill-assorted
ill-chosen
ill-considered
ill-fitted
ill-matched
ill-placed
ill-seasoned
ill-sorted
ill-suited
ill-timed
immature
impolitic
improper
impulsive
in a bind
in abeyance
inadmissible
inadvisable
inapplicable
inapposite
inappropriate
inapt
inauspicious
incongruous
inconvenient
inept
ignominious
impending
inevitable
premature
startle
timely
tragic
unavoidable
unbecoming
unexpected
unforeseen
unseasonable
unseemly
untoward
unwarrantable
unwelcome
appropriate
proper