nuttily
Adverb
Meaning
in a mildly insane manner
Source: WordNetSynonyms
balmily
daftly
dottily
wackily
madly
irrationally
crazily
insanely
maniacally
fiendishly
dementedly
neurotically
hysterically
feverishly
deliriously
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Antonyms
Examples
the old lady is beginning to behave quite dottily