DON'T USE BIG WORDS
ANONYMOUS

In promulgating your esoteric cogitations, or articulating your superficial
sentimentalities and amicable, philosophical or psychological observations,
beware of platitudinous ponderosity. Let your conversational communications
possess a clarified conciseness, a compact comprehensibleness, coalescent
consistency, and a concatenated cogency. Eschew all conglomerations of
flatulent garrulity, jejune babblement and asinine affectations. Let your
extemporaneous descantings and unpremeditated expatiations have intelligibility
and veracious vivacity, without rhodomontade or thrasonical bombast. Sedulously
avoid all polysyllabic profundity, pompous prolixity, psittaceous vacuity,
ventriloquial verbosity, and vaniloquent vapidity. Shun double-entendres,
prurient jocosity, and pestiferous profanity, obscurant or apparent.

In other words, talk plainly, briefly, naturally, sensibly, truthfully, purely.
Keep from "slang"; don't put on airs; say what you mean; mean what you say.
And don't use big words!

https://archive.org/details/humoroushitshowt00klei

Humorous hits and how to hold an audience; a collection of short selections,
stories, and sketches for all occasions by Kleiser, Grenville, 1868-1953