my father memorized this speech about using long words:
In promulgating your esoteric cogitations
or articulating your superficial sentimentalities and amicable philosophical and psychological observations,
beware of platitudinous ponderosities.
Let your conversational communications
possess a clarified conciseness,
a coalescent consistency and a concatenated cogency.
Eschew all conglomerations of flatulent garrulity,
jejune babblement and asinine affections.
Let your extemporaneous descantings and
unpremeditated expatiations have intelligibility and
veracious vivacity without rodomontade orthrasonical bombast.
Sedulously avoid all polysyllabic profundity,
setatious vacuity,
ventriloqual verbosity or
vain vapidity,
obscurant or apparent.
Shun double entendre,
purient jocosity and
pestiferous profanity.
In other words…
Say what you mean and
mean what you say,
and don’t use big words!!