恆等 [恒－]

Jyutping hang4 dang2
Pinyin héng děng

Definitions (CC-CEDICT)
  1. identity ≡ (math., logic)
  2. identical
Definitions (Wiktionary)
  1. verb
    to be identically equal; to be identical
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）