半信半疑

bànxìnbànyí
(idiom) half believing, half doubting; not quite convinced; skeptical

CEDICT

Entry Composition

1 半 bàn
  1. half
  2. semi-
  3. incomplete
  4. (after a number) and a half
2 信 xìn
  1. letter
  2. mail
  3. to trust
  4. to believe
  5. to profess faith in
  6. truthful
  7. confidence
  8. trust
  9. at will
  10. at random

classifier: 封
3 半 bàn
  1. half
  2. semi-
  3. incomplete
  4. (after a number) and a half
4 疑 yí (bound form) to doubt; to suspect