おそosoreiru
1.

To express a feeling of being overwhelmed by someone's kindness or generosity, often accompanied by a sense of humility and gratitude.

2.

To feel a deep sense of respect or admiration in light of someone's exceptional qualities or abilities, leading to a realization of one's own limitations.

3.

To convey a sense of unease or discomfort when faced with an unfavorable situation, particularly when one feels they have caused inconvenience or offense to someone else.

4.

To experience a feeling of astonishment or disbelief in response to an outrageous or absurd situation.

Example:

間髪を入れず、迅速かつ的確な応対、畏れ入ります。