You don't, it is four separate letters aRe, eSs, Vee, Pee.
It is an abbreviation not an acronym.
Generally, one pronounced each letter: R S V P.
You pronounce it peeeee can.
The antonym for mispronounce is pronounce correctly.
fo-door
Ah .
no
BUTT-un
The same reason it's important to to pronounce english words correctly. So that people can understand you.
From laban.org: To correctly pronounce Laban, stress the first syllable as in 'carbon'.
RSVP is a French phrase Repondez s'il vous plait, meaning ' please reply ' RSVP to.......
It's nAH-tAh
The Check Republic
She struggled to pronounce the foreign name correctly.