undertake solemnly 的近义词 17 个

• affirm
• assure
• declare
• promise
• swear
• consecrate
• covenant
• dedicate
• devote
• pledge
• plight
• testify
• vouch
• warrant
• cross one's heart
• give word of honor
• swear up and down

undertake solemnly 的反义词 4 个

• deny
• break
• misuse
• disavow