to have uncertainty regarding something
Zweifel an etwas haben (Zweifel an etwas haben)
"I have serious doubts about his honesty."
"Ich habe ernsthafte Zweifel an seiner Ehrlichkeit." (Ich habe ernsthafte Zweifel an seiner Ehrlichkeit)
to mention or speak about something
to turn your focus inward for calm and peace
to compare prices or products before buying
to feel or express gratitude for something
to move into traffic from the side of the road
to remain at home instead of going out