doubt

noun
B1
1
a feeling of being uncertain about something or not believing something
شک, تردید, عدم اطمینان
see also self-doubt
verb
B1
1
B1
to feel uncertain about something; to feel that something is not true, will probably not happen, etc.
شک کردن, تردید داشتن
2
to not trust somebody/something; to not believe somebody
شک داشتن, اعتماد نکردن, ایمان نداشتن, شک کردن به, باور نکردن
I had no reason to doubt him.