---
title: "How to pronounce infinitesimal | Murmur"
description: "Check infinitesimal pronunciation with CMUdict sound tokens and stress, then practise two original sentences and download a voiceover audition worksheet."
canonical: "https://www.murmurtts.com/pronunciation/infinitesimal"
---
[Murmur](https://www.murmurtts.com/)/[Pronunciation](https://www.murmurtts.com/pronunciation)/infinitesimal

PRONUNCIATION / Science and learning

# How to pronounce infinitesimal

Check infinitesimal pronunciation with CMUdict sound tokens and stress, then practise two original sentences and download a voiceover audition worksheet.

## The dictionary sound sequence

CMUdict lists this North American English pronunciation for **infinitesimal**. Read each sequence from left to right. The numbers mark vowel stress: **1** primary, **2** secondary, **0** unstressed.

Dictionary variant 1

`IH2 N F IH0 N IH0 T EH1 S IH0 M AH0 L`

**Syllable estimate**

6 vowel nuclei

**Primary stress**

4th vowel position

**Secondary stress**

1st vowel position

[Check infinitesimal in Merriam-Webster and listen to available dictionary audio](https://www.merriam-webster.com/dictionary/infinitesimal).

Syllable counts come from vowel tokens; CMUdict does not supply syllable boundaries here. Variant order follows the dictionary and does not rank correctness. This lexicon does not represent every accent or context.

## Use infinitesimal in context

Infinitesimal describes something extremely small and has a more specific role in some mathematical discussions. Science narration should establish whether it is using the word informally or technically. A concrete scale, comparison, or definition prevents the listener from confusing a very small quantity with a claim that it is exactly zero.

1. The instrument detected an infinitesimal change in the signal.
2. The lesson explains what an infinitesimal means within the chosen mathematical framework.

### A practice cue

Audition infinitesimal beside the comparison or formal definition in your script. Listen for the full word remaining clear at the lesson's normal pace, and check any numbers separately so a smoothly spoken adjective does not conceal the actual scale being described.

## Read the sound tokens

Each example word below is a cue for the named sound, rather than a respelling of infinitesimal. Unstressed vowels may sound reduced. These cues follow the [CMU phoneme-set key (Appendix A)](https://www.cs.cmu.edu/~aria/Papers/MastersThesis.pdf#page=115).

`IH`sound in **it**vowel`N`sound in **knee**consonant`F`sound in **fee**consonant`T`sound in **tea**consonant`EH`sound in **Ed**vowel`S`sound in **sea**consonant`M`sound in **me**consonant`AH`sound in **hut**vowel`L`sound in **lee**consonant

TAKE IT TO YOUR NEXT RECORDING

## Make an audition worksheet

Select a dictionary variant for your checklist. The two original sentences retain their normal spelling; this worksheet helps you review a recording rather than forcing a speech engine to use phonemes.

Copying and downloading happen in your browser. No script upload or audio generation is needed.

## Dictionary source

The phonemes on this page come from [CMU Pronouncing Dictionary](https://github.com/cmusphinx/cmudict/blob/74790861f652b15e4ac49015a90074ad62a27690/cmudict.dict). The dictionary maintainers acknowledge that errors and omissions can remain; check another source or a speaker when the pronunciation matters.

[CMUdict README](https://github.com/cmusphinx/cmudict/blob/74790861f652b15e4ac49015a90074ad62a27690/README) · [Included dictionary license](https://www.murmurtts.com/downloads/cmudict-license.txt)

Source version and checksum

Commit: `74790861f652b15e4ac49015a90074ad62a27690`

Dictionary SHA-256: `81917843c7f44ce2b094ac63873c2c7a4cf802040792c455ba3ca406891c3d22`

## Keep practising

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[Build a pronunciation test suite for local TTS](https://www.murmurtts.com/blog/pronunciation-test-suite-local-tts) · [Browse all word references](https://www.murmurtts.com/pronunciation)

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## Check the word in a real voiceover.

Murmur generates speech locally on Apple Silicon Macs. Try your audition sentences with your chosen model and voice, listen for pronunciation, and review the result before exporting. A dictionary sequence does not guarantee a model’s output.

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