[--齿]

Jyutping saat3 ngaa4 ci2
Pinyin shuā yá chǐ

Definitions (Wiktionary)
  1. verb, dialectal, intransitive, verb-object
    to brush one's teeth
    (syn.) 漱齒, 糙嘴, 鑪牙齒, 抿牙, 搓牙齒, 漱嘴, 洗牙, 洗喙, 抿喙齒, 洗嘴, 漱口, 洗牙齒, 洗喙齒, 刷牙齒, 刷牙子, 刷牙, 嘓嘴, 洗口