circumlocution

noun4

1. •
   A roundabout or indirect way of speaking.

   • His Majesty leaves the choice to your self, and requires from you a direct Answer without circumlocution or bargaining with him […] — 1618
2. •
   Unnecessary use of extra words to express an idea, such as a pleonastic phrase (sometimes driven by an attempt at emphatic clarity) or a wordy substitution (the latter driven by euphemistic intent, pedagogic intent, or sometimes loquaciousness alone).
3. •
   Necessary use of a phrase to circumvent either a vocabulary fault (of speaker or listener) or a lexical gap, either monolingually or in translation.

   • A technical word, such as hyperkalemia or hypoallergenic, can be glossed for general audiences with a circumlocution, such as "high potassium level" or "less likely to cause allergies" (respectively).
4. •
   An instance of such usage; a roundabout expression, whether an inadvisable one or a necessary one.