-ize suffix

Core Rule

The suffix -ize comes from Greek -izein, meaning “to make, to render, or to cause to become.” It typically attaches to nouns or adjectives to form verbs, especially in academic and formal English. The spelling -ize is standard in American English and widely accepted in international scholarly writing.

Pronunciation Guide

-ize is pronounced /aɪz/. The suffix forms a full syllable but does not carry primary stress. The diphthong /aɪ/ glides from a low-front to a high-front tongue position, followed by the voiced fricative /z/, requiring vocal cord vibration and continuous airflow.

Word Analysis

civilize /ˈsɪvəlaɪz/: civil + -ize, meaning “to make civilized.” Note that the stress remains on the first syllable of the base word, while -ize stays unstressed yet clearly articulated.

Pitfall Alert

Learners often confuse -ize with -ise. While both exist, -ize is preferred in American English. Another common error is devoicing /z/ to /s/, which results in nonstandard pronunciation.