by halves
defectively
deficiently
dissatisfactorily
faultily
imperfectly
in half measures
in installments
inadeptly
inadmissibly
inaptly
incapably
incompetently
incompletely
inefficiently
ineptly
inexpertly
insufficiently
intolerably
objectionably
partially
poorly
unacceptably
unaptly
undeftly
undesirably
undexterously
unfacilely
unfitly
ungratifyingly
unproficiently
unsatisfactorily
unsatisfyingly
unskillfully
unsubstantially
unsuitably
adequately