吃勁 [－劲]

Jyutping hek3 ging3
Pinyin chī jìn

Definitions (Wiktionary)
  1. verb
    to bear weight; to sustain (weight)
    (syn.) 承重
  2. verb
    to need or exert great effort; to strain; to be strenuous
  3. adj, colloquial
    important; significant; major
    (syn.) 關鍵, 要緊, 要紧, 重大, 重要, 基本, 关键, 主要, 當家, 当家, 根本