Definition

1. Noun:
   • A speech sound that functions as a consonant but has the phonetic quality of a vowel: A semivowel is a sound produced with a relatively open vocal tract, similar to a vowel, but it acts as the margin or boundary of a syllable, like a consonant. In English, the sounds represented by the letters "w" and "y" in words like "wet" and "yes" are typical semivowels (also called glides).

Examples of Usage

• Noun:
  • In the word "yes," the initial sound /j/ is a semivowel.
  • The English phonemes /w/ and /j/ are classified as semivowels.
  • Linguists analyze the sound at the start of "we" as a labiovelar semivowel.

Advanced Usage

• Phonological Role: Semivowels often form diphthongs when they occur next to a vowel in the same syllable. For example, in the word "cow" /kaʊ/, the final sound is a semivowel that combines with the preceding vowel.
• Contrast with Vowels: While vowels typically form the core (nucleus) of a syllable, semivowels occupy the syllable edges (the onset or coda). For instance, in "yard," the semivowel /j/ is in the onset.

Variants and Related Words

• Glide: This is a common synonym for "semivowel" in phonetic terminology.
  • The terms "semivowel" and "glide" are often used interchangeably.
• Approximant: This is a broader phonetic category that includes semivowels. Semivowels are a type of approximant consonant.
  • Liquids (like /l/ and /r/) and semivowels are both classes of approximants.

Synonyms

• Glide: A sound that glides from one vowel position to another, functioning as a consonant.
• Non-syllabic vowel: A technical term highlighting that the sound is vowel-like but does not form a syllable peak.

Related Phrases (Linguistic Context)

• Semivocalic: Pertaining to or having the nature of a semivowel.
  • The semivocalic quality of the sound is evident in its articulation.
• Semi-consonant: An older or less technical term sometimes used synonymously with semivowel.

Noun

1. a vowellike sound that serves as a consonant