noun

1. Disbelief or uncertainty (about something); a particular instance of such disbelief or uncertainty.

   “I have doubts about how to convert this code to JavaScript.”

2. A point of uncertainty; a query.

verb

1. To be undecided about; to lack confidence in; to disbelieve, to question.

   “He doubted that was really what you meant.”

2. To harbour suspicion about; suspect.

3. To anticipate with dread or fear; to apprehend.

Synonyms: distrust, mistrust