abandoned
deserted
disregarded
half-done
ignored
laid aside
left undone
missed
neglected
omitted
overlooked
passed by
passed over
passed up
pigeonholed
put aside
shunted
sidelined
slighted
unasked
unattended to
uncared-for
unchaperoned
unconsidered
undone
unregarded
unsolicited
untended
unwatched