letter of support (noun) recommendation: advice, approval
Sinonime: bad, decomposed,
disappointing, disheartening, displeasing, low-quality, mortifying, not up to par, not up to snuff,
poor,
putrid,
quiet,
rancid,
rotten,
slack,
sour,
substandard, turned, unrewarding,
unsatisfactoryAntonime: on