Denshi Jisho — Online Japanese dictionary

消す けす 1: to erase; to delete; to cross out;
2: to turn off power;
3: to extinguish; to put out;
4: (Slang) to bump off
Common word, Godan verb with su ending, Transitive verb 
消する しょうする 1: to disappear;
2: () to cause to disappear; to get rid of;
3: (of time) to pass; to while away
Suru verb - special class, Intransitive verb 

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