How to Pronounce SQL, GIF, nginx, and Other Tricky Tech Words

Some tech terms have one correct pronunciation. Others have two competing camps, both equally valid. And some have a pronunciation that surprises almost everyone the first time they hear it. This guide covers the most searched, most debated, and most mispronounced tech words — with the context you need to sound confident.

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The Big Debates

These terms have genuinely divided communities. Here is the state of each debate.

SQL — “sequel” or “S-Q-L”?

Both are widely accepted, but “sequel” is more common in speech.

• “Sequel” (/ˈsiːkwəl/) — used by most database professionals, especially in the US. Origin: SQL was developed from a language called SEQUEL (Structured English QUEry Language), and the “sequel” pronunciation followed.
• “S-Q-L” (spell it out) — also correct, used more in formal contexts and documentation.

In practice: “I know sequel” or “I know S-Q-L” are both understood. For interviews, go with whichever your interviewer uses.

Note on variants: PostgreSQL is pronounced “Post-gres-Q-L” — not “Post-gres-quill”. The SQL part is always spelled out here.

GIF — hard G or soft G?

The creator says soft G (“JIF”). The internet mostly uses hard G (“GIF”).

• “JIF” (/dʒɪf/) — Steve Wilhite, the creator of the GIF format, stated definitively: “It’s pronounced JIF, not GIF.” He compared it to the peanut butter brand.
• “GIF” (/ɡɪf/) — how the vast majority of people pronounce it, treating it like “gift” without the T.

In technical communication, either is understood. Most developers use the hard G. Do not argue about this in a standup — it will not end well.

Linux — “LIN-uks” or “LYE-nuks”?

Linus Torvalds himself pronounces it “LIN-uks” (/ˈlɪnʊks/).

Many North American developers say “LYE-nuks” out of habit (following English phonics rules for the name “Linus”), but if you want to match the Finnish creator’s pronunciation, it is a short I: “LIN-uks.”

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The Words Everyone Gets Wrong

These are not debates — there is a standard pronunciation, and most people initially get it wrong.

nginx

Right: EN-jinx (/ˈɛndʒɪŋks/)

The X at the end is pronounced as a K+S sound, giving you “-inks” or “-jinx.” It is not “en-JEEKS” or “en-GEE-ex.”

Think of it as “engine” + “X”: en-jinX.

cache

Right: KASH (/kæʃ/)

One syllable, rhymes with “cash.” Never “KASH-ay” (that is the French word caché). Never “catch.” The browser cache, the CPU cache, the Redis cache — all pronounced “KASH.”

daemon

Right: DEE-mun (/ˈdiːmən/)

A background process running on a Unix system. Not “DAY-mon” or “DY-mon.” It rhymes with “lemon.” The word comes from Greek mythology (a daemon was a guiding spirit), and the English pronunciation follows the Greek-via-Latin path.

sudo

Right: SOO-doh (/ˈsuːdoʊ/)

“Substitute user do.” The “su” is pronounced like “sue,” and “do” rhymes with “go.” Not “SOO-doo.” You will hear both in practice, but “SOO-doh” is the standard.

cron

Right: KRON (/krɒn/)

Rhymes with “on.” Not “CRONE” (which is an old woman in fairy tales). The CRON job, the CRON daemon, the CRON tab — all one syllable: KRON.

regex

Right: REE-jex or REH-jex — both are fine

“Regular expression” shortened. The first syllable is usually stressed: REE-jex (American) or REH-jex. You will hear both. Do not say “re-GEKS.”

tuple

Right: TUH-pul or TOO-pul — community is split

This one has a genuine split in the developer community:

• “TUH-pul” (rhymes with “couple”) — mathematicians’ preference, from the word’s Latin roots
• “TOO-pul” (rhymes with “dupple”) — common among programmers

Python documentation does not officially specify. In practice, both are used. The safe choice in a mixed team: “TUH-pul.”

char

Right: CHAR (/tʃɑːr/)

As in “charcoal.” Not “care” or “car.” A char data type = a character. One syllable, pronounced like “char” in “charred wood.”

boolean

Right: BOO-lee-un (/ˈbuːliən/)

Three syllables: BOO-lee-un. Named after mathematician George Boole. Do not say “boo-LEE-an” or “BOLE-ee-an.” Stress the first syllable.

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Acronyms: Say the Letters

Most tech acronyms are spelled out letter by letter:

Acronym	How to say it
API	ay-pee-eye
HTTP	aitch-tee-tee-pee
CSS	see-ess-ess
HTML	aitch-tee-em-el
URL	you-ar-el
DNS	dee-en-ess
JWT	jay-double-you-tee
SSH	ess-ess-aitch
YAML	YAM-ul (spoken as a word)
JSON	JAY-son (like the name Jason)

The vowel-sound rule: When an acronym starts with a vowel sound, use “an” — not based on spelling, but sound. So: “an API”, “an HTTP request”, “an SQL query” (S sounds like “ess”), but “a URL” (“U” sounds like “you”).

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In Practice

The best way to lock in a pronunciation is to hear it in context. Look up any of these on YouGlish — it shows real video clips of native speakers using the word in a sentence. For technical terms specifically, searching “[term] pronunciation” on YouTube usually returns conference talks where the word comes up naturally.

One practical test: if you say the word in a meeting and people look confused or ask you to repeat, that is a signal. If nobody blinks, you are probably close enough.

In Practice: Navigating Nuance in Technical Communication

Let’s be honest – learning professional English as a developer, particularly when dealing with highly specialized terminology, can feel like navigating a dense forest. It’s not just about knowing the definitions of words like “SQL” or “nginx”; it’s about understanding how they’re actually used in conversations and documentation. Many non-native speakers find themselves focusing heavily on precise spelling and grammar, which is admirable, but can sometimes lead to overly formal or even stilted communication that doesn’t quite land with colleagues.

A key element often missed is the subtle difference between stating a fact and offering a suggestion. For example, if you’re reviewing another developer’s code, simply saying “This uses SQL incorrectly” isn’t particularly helpful. A more constructive approach might be: “I noticed this query could benefit from an index on the customer_id column – that would likely improve performance and readability for future updates.” This phrasing acknowledges the existing code while offering a specific, actionable improvement. Similarly, in Slack discussions about deploying changes, stating “The PR needs to be reviewed” is functional but lacks impact. Instead, try: “Could someone please review this PR focusing on the integration with the new API endpoints? I’ve added some tests to help ensure compatibility.”

Another common area of misunderstanding relates to levels of certainty. Saying “This will work” can sound incredibly confident and potentially misleading. It’s almost always better to frame things as probabilities or recommendations: “This should work, assuming the data structure remains consistent” or “I recommend testing this thoroughly with a representative dataset.” These softer phrases convey professionalism and acknowledge potential complexities without over-committing. Ultimately, clear communication is about conveying your understanding of the situation and guiding others towards the best solution, not dictating a single ‘correct’ answer.

Finally, remember that context matters hugely. The same word can have different connotations depending on the industry, team culture, and even the specific project. Observing how senior developers communicate, reading well-written documentation, and actively seeking feedback are invaluable tools for refining your communication skills within the tech world. It’s a continuous learning process – embrace the nuances!

# Example: Optimizing an nginx configuration using command-line arguments
nginx -s reload && echo "Reloading nginx configurations..."