1) Denote 2) Euphemise 3) Refer 4) To speak euphemistically 1) Euphemise 
• (v. t. & i.) To express by a euphemism, or in delicate language; to make use of euphemistic expressions.
Eu'phe·mize transitive verb & i. [ imperfect & past participle Euphemized ; present participle & verbal noun Euphemizing .] [ Greek ... .] To express by a euphemism, or in delicate language; to make use of euphemistic expressions. 
[v] - refer to something with a euphemism
euphemize To avoid saying, or writing, something direct, harsh, unpleasant, or offensive by using milder or more indirect language.
euphemise verb refer to something with a euphemism