Other hyponyms of diminish include
break,
shrink,
shrivel,
taper,
drop off,
fly,
vanish,
vaporize,
break,
ease off,
ease up,
flag,
slacken off,
weaken,
boil down,
concentrate,
decoct,
reduce,
contract,
shrink,
shrink,
shrivel,
shrivel up,
wither,
abate,
die away,
let up,
slack,
slack off,
deflate,
dwindle,
dwindle away,
remit,
de-escalate,
depreciate,
devaluate,
devalue,
undervalue,
shorten,
thin out,
decline,
go down,
wane,
wane,
wane,
decelerate,
retard,
slow,
slow down,
slow up,
decrescendo.