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невозвратимо adv. stresses
gen.	irrecoverably; irreparably
chem.	irretrievably
невозвратимый adj.
gen.	irretrievable; irreparable; unrecoverable; expendable; irrecoverable; irremeable; irrecuperable; irredeemable
Gruzovik	irrevocable
avia.	nonrecoverable
el.	non-returnable
ocean.	irreversible
transp.	non-recoverable

невозвратимо: 4 phrases in 4 subjects

European Bank for Reconstruction and Development	1
Insurance	1
Military	1
Nautical	1