musty
adjective
[ ˈmʌsti ]
• having a stale, mouldy, or damp smell.
• "a dark musty library"
Similar:
mouldy,
stale,
fusty,
damp,
dank,
mildewed,
mildewy,
decayed,
smelly,
stuffy,
airless,
unventilated,
frowsty,
claggy,
funky,
mucid,
Origin:
early 16th century: perhaps an alteration of moisty ‘moist’, influenced by must2.