烈火乾柴

烈火干柴
lièhuǒgānchái
  1. lit. intense fire to dry wood (idiom); inferno in a woodpile
  2. fig. consuming passion between lovers

CEDICT

本指乾燥的柴薪易起火而猛燒。常比喻男女太過接近，易生歡愛之情。《二刻拍案驚奇．卷一一》：「怎當得他每兩下烈火乾柴，你貪我愛，各自有心，竟自勾搭上了。」《紅樓夢．第六九回》：「真是一對烈火乾柴，如膠投漆，燕爾新婚，連日那裡拆得開。」也作「乾柴烈火」。

重編國語辭典

Entry Composition

1 烈火 lièhuǒ
  1. raging inferno
  2. blaze
2 乾 gān
  1. dry
  2. dried food
  3. empty; hollow
  4. taken in to nominal kinship; adoptive; foster
  5. futile; in vain
  6. (dialect) rude; blunt
  7. (dialect) to cold-shoulder
3 柴 chái
  1. firewood
  2. lean (of meat)
  3. thin (of a person)