How to Pronounce SQL, GIF, nginx, and Other Tricky Tech Words
The definitive answer on SQL vs. sequel, GIF with a hard or soft G, nginx pronunciation, and 15 more tech terms everyone debates.
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.
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.”
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.
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”).
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.