noun, na-adjective
polite and courteous; exceedingly respectful
Describes a very formal, elaborate politeness, often with a nuance of being overly or stiffly courteous. Used for behavior, speech, or attitude.
彼の慇懃丁重な態度には、かえって距離を感じた。
His excessively polite manner made me feel distant instead.
慇懃丁重に挨拶を交わした。
They exchanged greetings with elaborate courtesy.
A compound of 慇懃 (いんぎん, 'courteous') and 丁重 (ていちょう, 'polite, respectful'). Both parts reinforce the idea of deep politeness. The exact historical derivation is uncertain, but the combination is used to emphasize an especially high degree of courtesy.