不冷不热

不冷不熱
bùlěngbùrè
  1. (of weather) mild; temperate
  2. lukewarm; tepid
  3. mild; temperate
  4. neither familiar nor distant; keeping at arm's length (of a relationship with someone)

Wiktionary

Entry Composition

1 不 bù
  1. no; not so
  2. (bound form) not; un-
=2 冷 Lěng surname Leng
=2 冷 lěng cold
=2 冷 líng only used in 冷凙／冷𪞝
=2 冷 lǐng only used in 㓑冷
3 不 bù
  1. no; not so
  2. (bound form) not; un-
4 热 rè
  1. to warm up
  2. to heat up
  3. hot (of weather)
  4. heat
  5. fervent