rest assured
Be sure; not need to worry; trust.
You may rest assured that our best efforts will be put forth to give you complete satisfaction.
VERBS
be, feel, look, rest, seem
She felt assured when the doctor explained the test results carefully.
ADV
very
The new manager walked into the meeting with a very assured manner that impressed everyone.
totally
VERBS
be, look, seem
ADV
absolutely | virtually