微火

wēihuǒ
a low fire (for roasting)

CEDICT

slow fire; gentle heat

Wiktionary

Entry Composition

1 微 wēi
  1. tiny
  2. miniature
  3. slightly
  4. profound
  5. abtruse
  6. to decline
  7. one millionth part of
  8. micro-
  9. Taiwan pr. wéi
2 火 huǒ
  1. fire
  2. urgent
  3. ammunition
  4. fiery or flaming
  5. internal heat (Chinese medicine)
  6. hot (popular)
  7. classifier for military units (old)
  8. Kangxi radical 86