2 syllables: fire, wall. Stress on fire.
FEYER-wahl
/ˈfaɪɹwɑl/
firewall is pronounced FEYER-wahl (/ˈfaɪɹwɑl/). It has two syllables (fire-wall), with the stress on "fire". Firewall is a compound noun referring to a security barrier that monitors and blocks unauthorized access to a network or computer system, preventing the spread of threats. In computing, it can be hardware-based or software-based and is commonly deployed to enforce access control policies. The term emphasizes protective separation between trusted and untrusted zones, safeguarding data and services from intrusion.
Firewall is a compound noun referring to a security barrier that monitors and blocks unauthorized access to a network or computer system, preventing the spread of threats. In computing, it can be hardware-based or software-based and is commonly deployed to enforce access control policies. The term emphasizes protective separation between trusted and untrusted zones, safeguarding data and services from intrusion.
"The company deployed a new firewall to protect its internal network from external attacks."
"We configured the firewall to block certain ports and allow only essential traffic."
"Cloud providers offer managed firewall services with scalable rules."
You pronounce it as two syllables: /ˈfaɪrˌwɔl/. The stress is on the first syllable 'fire' and then a secondary beat on 'wall.' In US and UK speech, the vowels are the diphthong /aɪ/ in 'fire' and a broad /ɔ/ or /ɔː/ in 'wall' depending on accent. Tip: keep the 'fire' part crisp and don't glide too long into 'wall.' You can practice with: 'fire' + 'wall' with a tiny pause between, then blend.
Common errors include1) De-emphasizing the primary stress on the first syllable, which makes the word sound like two equal syllables; 2) Merging the /r/ and /w/ sounds too tightly, producing an awkward /rw/ cluster; 3) Mispronouncing the 'wall' vowel as a short /ɒ/ in American English; correct to /ɔl/ or /ɔːl/ depending on accent. Corrections: exaggerate the /ɹ/ in 'fire' and release to the /wɔl/ with a rounded lip shape for /ɔ/; practice by isolating 'fire' and 'wall' and then bridging them smoothly.
In US English, /ˈfaɪrˌwɔl/ with rhotic /r/ and a clear diphthong /aɪ/ in 'fire' and a darker /ɔ/ in 'wall.' In UK English, /ˈfaɪəˌwɔːl/ tends to reduce the /r/ (non-rhotic) and lengthen the second vowel to /ɔː/. Australian English similarly tends toward /ˈfaɪəˌwɔːl/ with non-rhotic tendencies and a broader vowel quality in 'wall.' Listen for rhoticity and vowel length differences; you’ll adapt by adjusting lip rounding and the nasal /r/ articulation in US vs non-rhotic patterns in UK/AU.
The difficulty stems from a two-syllable rhythm with a stressed first syllable and a secondary stress in the second; the /ɹ/ consonant cluster transitioning into /w/ can feel abrupt, and the 'wall' part requires a precise /ɔl/ vowel quality that often shifts in rapid speech. Additionally, the diphthong /aɪ/ in 'fire' must be held long enough to avoid clipping, and some speakers merge /aɪr/ into a single sound. Focus on separating the syllables briefly, then synthesis.
The term combines a strong, front-centered diphthong /aɪ/ with a rounded back vowel /ɔ/ in 'wall,' plus the /r/ sound immediately before a consonant cluster, which can challenge non-native speakers. It also features a stressed-unstressed pattern that benefits from controlled tempo: strong initial stress followed by a lighter second segment. Practicing the two parts separately and then together yields clearer articulation.
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The term firewall originated in the 15th century in maritime contexts as a barrier of planks to prevent the spread of fire on ships. In computing, the metaphorical use emerged in the 1980s as networks grew more complex and threats more prevalent; the idea was to create a protective wall between trusted internal networks and untrusted external networks. The earliest usage in a computing sense appeared in technical literature in the late 1980s, aligned with the adoption of packet-filtering gateways. Over time, firewall design evolved from simple packet filters to stateful inspection, deep packet inspection, and application-layer gateways, incorporating both hardware and software implementations. The word preserves the protective connotation of a physical firewall while adapting to digital security domains.
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💡 These words have similar meanings to "firewall" and can often be used interchangeably.
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Words that rhyme with "firewall"
-ial sounds
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