solemnize

Từ điển American Heritage Dictionary 4th

sol·em·nize (sŏlʹəm-nīz')tr.v. sol·em·nized, sol·em·niz·ing, sol·em·niz·es
1. To celebrate or observe with dignity and gravity. See Synonyms at observe.
2. To perform with formal ceremony.
3. To make serious or grave. sol'em·ni·zaʹtion (-nĭ-zāʹshən) n.