doubtful
🇺🇸
/ˈdaʊtfl/
🇬🇧
/ˈdaʊtfl/
not sure or certain
She felt doubtful about the plan's success.
她對計劃的成功感到不確定。
not likely to happen
His recovery is doubtful after the injury.
受傷後他的康復可能性不大。
likely to get worse
The weather looks doubtful for our picnic.
天氣看起來可能會變糟,不適合我們的野餐。
not reliable or good quality
The doubtful product did not work as promised.
這個不可靠的產品沒有像承諾的那樣工作。