字頭 [－头]

Jyutping zi6 tau2
Pinyin zì tóu

Definitions (Kaifangcidian)
  1. 堂口
  2. 幫會 – 帮会
  3. 幫派 – 帮派

字頭 [－头]

Jyutping zi6 tau4
Pinyin zì tóu

Definitions (粵典–words.hk)
  1. 名詞、黃賭毒
    借代​黑社會​；​由​於​香港​法例​禁止​自稱​黑​社會​，​社團​人士​要用​簡稱​或​暗語​互相​稱呼​，​通常​以​全名​嘅​第一​個​字​做​簡稱​，​呢​個​簡稱​就​叫​字頭
    refers to some triad society; it is illegal to identify as a triad member in Hong Kong, so triad members often call their organization in code word using the initial character
    • 曬字頭
      晒字头
      saai3 zi6 tau4
      to reveal the name of one's protector
    • 你咩字頭架？
      你咩字头架？
      nei5 me1 zi6 tau4 gaa3.
      Which triad organization are you from ? (Which initial letter are you from ?)
  2. 詞綴
    一個​詞​或數​字​嘅​開​頭​，​亦​指用​呢​個​開​頭​嘅​詞​或​數​字
    initial character(s) of a word or number; also refers to the class of words or numbers that has such an initial
    • 我就嚟冇一字頭啦。
      我就嚟冇一字头啦。
      ngo5 zau6 lai4 mou5 jat1 zi6 tau4 laa1.
      My teenage years are almost over.
    • 英文字s字頭最多。
      英文字s字头最多。
      jing1 man4 zi6 es zi6 tau4 zeoi3 do1.
      The number of English words starting with S is the greatest.
    • 你電話係唔係9字頭？
      你电话系唔系9字头？
      Does your phone number start with a '9'?
Definitions (Wiktionary)
  1. noun, Cantonese, Hong-Kong
    triad society
  2. noun
    radical of a Chinese character when on top

字頭 [－头]

Jyutping
Pinyin zì tóu

Definitions (CC-CEDICT)
  1. first letter of a word or serial number
  2. first character of a Chinese word
  3. first digit of a number
  4. the top part (esp. a radical) of a Chinese character
  5. the initial of a Chinese syllable
Examples (粵典–words.hk)
  1. Cantonese
    小心三字头嘅电话号码，唔好俾人哼哈勒榨呀！
    小心三字頭嘅電話號碼，唔好俾人哼哈勒榨呀！
    siu2 sam1 saam1 zi6 tau4 ge3 din6 waa2 hou6 maa5, m4 hou2 bei2 jan4 hang1 haa1 lak6 zaa3 aa3!
    • Look out for phone numbers starting with 3, don't be extorted!
  2. Cantonese
    晒字头
    曬字頭
    saai3 zi6 tau4
    • to reveal the name of one's protector
  3. Cantonese
    你咩字头架？
    你咩字頭架？
    nei5 me1 zi6 tau4 gaa3.
    • Which triad organization are you from ? (Which initial letter are you from ?)
  4. Cantonese
    我就嚟冇一字头啦。
    我就嚟冇一字頭啦。
    ngo5 zau6 lai4 mou5 jat1 zi6 tau4 laa1.
    • My teenage years are almost over.
  5. Cantonese
    英文字s字头最多。
    英文字s字頭最多。
    jing1 man4 zi6 es zi6 tau4 zeoi3 do1.
    • The number of English words starting with S is the greatest.