Plain, yes. Boring, no. Barbarous, never!
- Never use a metaphor, simile, or other figure of speech that you are used to seeing in print.
- Never use a long word when a short word will do.
- If it is possible to cut out a word, always cut it out.
- Use the active rather than passive voice.
- Never use a foreign phrase, a scientific word, or a jargon word if you can think of an everyday English equivalent.
- Break any of these rules sooner than say anything outright barbarous.