After a far greater than anticipated amount of research, I am still unable to find and confirm an exact antonym for the word 'replicable'. I have found multiple sites that have one (or some combination) of the three following words: 'unreplicable', 'non-replicable', and 'irreplicable'. For a 4 page paper that I am writing, (I'll be using one of these three words in a thesis statement which I've been attempting to perfect for 20 minutes now), which one of these three words (or maybe some other word) would be best?

My thesis statement is here: https://pastebin.com/7ywaPhq3

  • With once-in-a-lifetime emotion...
    – Jim
    May 21, 2017 at 1:18
  • 2
    I'd be inclined to use "irreplicable".
    – Hot Licks
    May 21, 2017 at 1:21

3 Answers 3


Though none of the reliable dictionaries includes words irreplicable, unreplicable, and non-replicable/nonreplicable, they are seen on websites as normal as any other words. Of these three words, the non-hyphenated nonreplicable has the highest acceptability and unreplicable is more acceptable than irreplicable as per the Google Ngram Viewer.

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I think it is better to avoid any such dubious words in an academic thesis and instead, rephrase the sentence using some other expressions, as:

...while managing to invigorate nearly all viewers with irreproducible emotions.

  • But isn’t each viewer “reproducing” that emotion? 8^p
    – Jim
    May 21, 2017 at 1:54

Replicable means something for which a replica (a copy) can be created.

Reproducible means something that can be reproduced.

A replica is considered to be a more exact duplicate than a reproduction, but the terms "replicable" and "reproducible" are similar in meaning.


Would unrepeatable be an option?

invigorate nearly all viewers with unrepeatable emotion.

I might even go so far as to say

invigorate nearly all viewers with unique and unrepeatable emotion.

Also, you might want to consider removing the comma before while:

...maintaining much significance itself while managing...

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