Etymology
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obliterate (v.)

"blot out, cause to disappear, remove all traces of, wipe out," c. 1600, from Latin obliteratus, past participle of obliterare "cause to disappear, blot out (a writing), erase, efface," figuratively "cause to be forgotten, blot out a remembrance," from ob "against" (see ob-) + littera (also litera) "letter, script" (see letter (n.)). The verb was abstracted from the phrase literas scribere "write across letters, strike out letters." Related: Obliterated; obliterating.

updated on July 25, 2019

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Definitions of obliterate from WordNet
1
obliterate (v.)
mark for deletion, rub off, or erase;
Synonyms: kill / wipe out
obliterate (v.)
make undecipherable or imperceptible by obscuring or concealing;
Synonyms: obscure / blot out / veil / hide
obliterate (v.)
remove completely from recognition or memory;
Synonyms: efface
obliterate (v.)
do away with completely, without leaving a trace;
2
obliterate (adj.)
reduced to nothingness;
Synonyms: blotted out / obliterated
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.