One syllable: cubes.
/ˈkjuːbz/
Say it backCubes is the plural form of cube, meaning solid geometric figures with equal edge lengths; in mathematics it also denotes the result of raising a number to the third power. The word is used in contexts ranging from geometry and 3D modeling to playful mathematical discussions. Phonetically, it ends with a voiced /z/ and a short /uː/ or /juː/ vowel quality before the /z/ sound, depending on accent and stress.
"The cubes on the floor formed a neat pattern in the toy room."
"In math class, we learned that 4 cubed equals 64."
"She stacked three wooden cubes to build a small tower."
Pronounce as /kjuːbz/ in US/UK/AU. Start with a light /k/ release, glide from /j/ into a /uː/ vowel, then end with a voiced /bz/ cluster. The /uː/ can sound like a "you"-like vowel, followed quickly by /bz/. Stress is on the single syllable: KUH-bz with the "u" as a long vowel before the /bz/.
Common errors include pronouncing it as /ˈkʌbz/ (short /ʌ/ as in cup) or dropping the /j/ glide and turning it into /kuz/ or /kubs/. Another frequent slip is merging /juː/ into a simple /u/ or /ju/ with a lenited /z/. To correct: keep the /j/, ensuring the /k/ leads into /j/ then the long /uː/ vowel before the /bz/ cluster. Practice with a slow pace focusing on the glide and the voicing of /z/.
In US and UK, /kjuːbz/ is standard with a /j/ onset after /k/. In some non-rhotic UK varieties, the final /z/ remains voiced but the preceding vowel can be shorter; Australian English tends to maintain a full /juː/ glide similar to US, with slightly shorter overall duration in rapid speech. Rhythmic naturalness may shift slightly, but the core is the /k/ + /j/ + /uː/ + /bz/ sequence.
Because of the /j/ sound blending with the /uː/ vowel leading into a consonant cluster /bz/, many learners substitute /juː/ with /u/ or drop the /j/ entirely, producing /kuːbz/ or /kuz/. The voiced /z/ at the end requires precise voicing; in rapid speech it can become devoiced or fused. Coordinating tongue blade position for /k/ and the palatal /j/ while maintaining a rounded back vowel makes it a nuanced cluster for non-native speakers.
Yes. The word relies on a clear, fast transition from /k/ to /j/ to /uː/, then a distinct /bz/. The /j/ is not optional; you should feel a brief palatal glide after the /k/. Stress remains monosyllabic but precise. Ensure the /z/ remains audible; in singing or rapid speech, you might oscillatorily assimilate to /bz/.
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The term cube originates from the Middle English cube, borrowed from Old French cube, which in turn comes from Latin cubus. The Latin cubus likely derives from Ancient Greek kybos (κύβος), meaning a die or a cube, a root related to the idea of a three-dimensional solid with equal edges. The mathematical sense—raising a number to the third power—emerged in scholarly contexts as algebra advanced in the 17th century, aligning with the geometric notion of a perfect cube in Euclidean space. By the early modern period, cube had fossilized into two primary senses: a geometric solid (the 3D figure) and the arithmetic operation (x^3). The plural cubes appears in standard usage when referring to more than one such solid or operation result, with “cube” dating back earlier in general English usage as a word for a die, a type of block, or a square in various abstract senses. First known uses in printed English are attested in mathematical and geometric texts from the 16th–17th centuries, with the plural form becoming common in everyday contexts by the 19th century as formal education broadened.”,
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💡 These words have similar meanings to "cubes" and can often be used interchangeably.
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Words that rhyme with "cubes"
-bes sounds
-al) sounds
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