存疑

cúnyí
  1. to leave a question open
  2. to hold doubts; to be skeptical

CEDICT

to leave a question open; to leave an unresolved matter aside for future consideration

Wiktionary

对尚有疑点的问题，暂时保留不加论定。

重編國語辭典

Entry Composition

1 存 cún
  1. to exist
  2. to deposit
  3. to store
  4. to keep
  5. to survive
2 疑 yí (bound form) to doubt; to suspect