“Pigeon” in Chinese is 鸽子 (gēzi).
上次好像没跟她解释我放她鸽子的原因。
Example sentence from Tatoeba (CC BY 2.0).
Not to be confused with: 个子 (gèzi, stature; height; size (of a person or object)) · 各自 (gèzì, each)