rhotic

Rule Core

The er sound is an r-controlled vowel, where a vowel followed by r loses its pure quality and merges with /r/. In stressed syllables it’s typically /ɝ/ (as in her), while in unstressed syllables it reduces to /ər/ (as in teacher).

Articulation Guide

Curl the tongue tip slightly upward without touching the palate. Keep lips relaxed and the jaw neutral. Maintain steady airflow; do not insert an extra vowel before or after /r/.

Word Analysis

• clerical: The cler- syllable is unstressed, producing a reduced /ər/ rather than a full vowel.
• convert: As a noun (ˈkɒnvɜːrt), -vert carries a clear /ɝ/; as a verb (kənˈvɝt), stress shifts but the r-coloring remains.
• deer: Not an er sound. It’s ee + r /dɪr/, included to highlight contrast.

Pitfalls

Do not confuse er with ear/eer spellings, and always check stress, which determines /ɝ/ vs /ər/.