smugly

In a sentence

the bureaucrats explained smugly that the facts provided by their own experts show no cause for concern

कर्मचारीहरूले आत्मसन्तुष्टिसाथ व्याख्या गरे कि उनीहरूका आफ्नै विज्ञहरूले दिएका तथ्यले चिन्ताको कारण देखाउँदैनन्।