long ai

Rule Core

The ai long vowel typically represents /eɪ/, the same sound as the letter name A. Phonetically, the first vowel a carries the nucleus, while i triggers a glide, creating a smooth rising diphthong.

Articulation Guide

Start with the tongue in a mid‑front position, then glide upward toward the high‑front area. The mouth moves from half‑open to slightly narrowed. Airflow remains continuous without a break.

Word Analysis

In acclaim, ai appears in a stressed syllable and clearly forms /əˈkleɪm/. In acquaint, despite the qu cluster, ai retains /eɪ/: /əˈkweɪnt/. In afraid, the open syllable plus stress produces a strong /eɪ/: /əˈfreɪd/.

Pitfall Alerts

Do not confuse ai /eɪ/ with short a /æ/. In unstressed syllables or loanwords, variation may occur, but the long‑A rule remains the default.