solemnity
/səˈlemnətɪ/noun
(pl. -ies)［mass noun］
1- the state or quality of being serious and dignified庄严; 庄重：
his ashes were laid to rest with great solemnity.
他的骨灰以非常庄重的仪式安葬入土。
1.1
- count noun（常作solemnities）a formal, dignified rite or ceremony庄重的仪式：
the ritual of the church was observed in all its solemnities.
教堂的典礼遵循它所有庄重的仪式。
词源
Middle English （in the sense 'observance of formality and ceremony'， frequently in the phrases in solemnity， with solemnity）： from Old French solemnite, from Latin sollemnitas, from sollemnis （see SOLEMN）.