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unverbesserliche adj.
gen.	incorrigibly; inveterately; irreclaimably
unverbesserlich adj.
gen.	dyed-in-the-wool; incorrigible; incorrigibly; inveterate; irreclaimable; irreclaimably; unreformable; incurable; inveterately; irredeemable
comp.	irrecoverable; unrecoverable
fig.	incurably

unverbesserliche: 8 phrases in 3 subjects

Computers	3
General	2
Medical	3