2 syllables: back, up. Stress on back.
BAK-uhp
/ˈbæˌkʌp/
backup is pronounced BAK-uhp (/ˈbæˌkʌp/). It has two syllables (back-up), with the stress on "back". Backup refers to something kept ready to be used if needed, or to support someone or something. As a noun, it can mean a reserve or support; as a verb, it means to provide support or to move in reverse. In everyday usage, it often describes a secondary or precautionary resource, or actions taken to safeguard or assist.
Backup refers to something kept ready to be used if needed, or to support someone or something. As a noun, it can mean a reserve or support; as a verb, it means to provide support or to move in reverse. In everyday usage, it often describes a secondary or precautionary resource, or actions taken to safeguard or assist.
"We kept a backup copy of the file in the cloud."
"The backup plan is to evacuate if the weather worsens."
"She asked her teammate to provide backup during the presentation."
Backup is pronounced /ˈbækˌʌp/ in General US/UK pronunciation. The first syllable carries primary stress: /ˈbæk/. The second syllable is /ʌp/, with a reduced, quick schwa-like vowel often realized as /ə/ in rapid speech. Don’t fuse the /k/ with the following word. In slow speech you might hear a clearer де- emphasis on the second syllable: /ˈbækˌʌp/.
Two common errors: (1) Misplacing stress by saying /ˈbækˌup/ with long /u/ in the second syllable – correct by keeping the short /ʌ/ and a crisp /p/. (2) Attaching the word to the next sound, like /ˈbæ- kjuː/ or drawing out the second vowel as /aʊ/. Practice by isolating syllables: /ˈbæk/ + /ˌʌp/, then blend with a light pause in multi-word phrases. Also avoid reducing the first vowel to a lax schwa in the stressed syllable.
In US and UK rhotic varieties, the pattern remains /ˈbækˌʌp/ with a non-rhotic UK may still keep /r/ absent; the main difference appears in flapping in American casual speech: the /t/ voice might influence neighboring vowels, but /ˌʌ/ remains stable. Australian accents tend to be non-rhotic as well; expect similar stress and vowel quality, but with slightly more centralized or rounded /ʌ/ and faster rhythm. Overall, vowel height and duration are the primary cross-accent differences.
The difficulty lies in maintaining stable pitch and stress across two syllables in fast speech, while the /ˌʌ/ vowel can be subtle and easily reduced or merged with nearby vowels. The contrast between /æ/ in the first syllable and /ʌ/ in the second requires precise tongue height. Also, the sequence /k/ + /ʌ/ can blur in rapid speech, so you want a crisp release before the /ʌ/ vowel. Practicing with slow, deliberate articulation helps.
The word has a two-syllable, stress-timed pattern with a clear primary stress on the first syllable and a secondary-contrast vowel in the second syllable. The combination /ˈbækˌʌp/ contrasts the front lax vowel /æ/ with the mid-central /ʌ/ and ends with a voiceless alveolar stop /p/. The placement of stress and the crisp /k/ release are what give it its recognizable, compact rhythm in speech.
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Backup derives from the two-word phrase back up, which dates to Middle English and Old French roots. The sense of “support” or “to reinforce” comes from backing someone or something so that it stands or moves safely. The noun use for a reserve or secondary resource developed from the same metaphor: to have something in the back as a prop or cushion. In computing, backup extended the metaphor to mean duplicating data for safekeeping, a usage that gained prominence with the rise of digital storage in the late 20th century. First attested senses include phrases like “to back up a defender” in medieval contexts, evolving through 14th–16th centuries into the modern dual noun-verb system. The term spread into technical domains, where “backup” files or systems imply redundancy. In contemporary usage, backup also functions as an adjective (backup plan) and an adverbial modifier in some phrasings, though most common is the noun-verb pair with the sense of reinforcement and redundancy.
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💡 These words have similar meanings to "backup" and can often be used interchangeably.
🔄 These words have opposite meanings to "backup" and show contrast in usage.
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Words that rhyme with "backup"
-kup sounds
- up sounds
Practice with these rhyming pairs to improve your pronunciation consistency:
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