硬頭 [－头]

Jyutping ngaang6 tau4
Pinyin yìng tóu

Definitions (Wiktionary)
  1. adj, Xiamen, Zhangzhou-Hokkien
    arduous; strenuous
    (syn.) 硬气, 硬斗, 硬繚, 硬氣, 硬缭, 硬水