desensitize impair abate alleviate anesthetize benumb blunt check chloroform consume cushion damp dampen depress deprive destroy devitalize dim dope drown dull etherize exhaust freeze frustrate gas hush incapacitate injure lessen mute numb paralyze quieten reduce repress retard slow smother soften stifle stun stupefy suppress tire unnerve weaken KO knock out lay out put out of order put to sleep tone down