Why does the word square have one syllable?

The word "square" has one syllable because of how its vowel sounds are pronounced and blended together:

* The "a" sound is short and unstressed: It's like the "a" in "cat" or "hat."

* The "e" sound is silent: It's a common way to represent the short "a" sound in English.

* The "u" sound is also silent: The "u" in "square" is a historical relic and doesn't contribute to the pronunciation.

Therefore, the entire word is pronounced with a single, short sound, making it one syllable.