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English word vicious comes from Proto-Indo-European *wi-tio-, Portuguese -oso (-ous, -y.)
*wi-tio- (Proto-Indo-European)
-oso (Portuguese)
-ous, -y.
vitium (Latin)
Crime. Fault, defect, blemish, error. Vice.
viço (Portuguese)
(dated) vice. Luxuriance, lushness. Vigour, flushness.
vitiosus (Latin)
Full of faults or defects; faulty, defective, bad, corrupt. Morally faulty, wicked, depraved, vicious.
vicious (Old French)
Defective; not capable of functioning. Vicious; malicious.
vicious (Anglo-Norman)
vicious (English)
(archaic) Pertaining to vice; characterised by immorality or depravity.. Savage and aggressive.. Violent, destructive and cruel.