impledge
/ɪmˈplɛdʒ/ or /ɪmˈplɪdʒ/Definitions
1. noun
a pledge or agreement, especially one made in a formal or solemn manner
“The treaty was a binding impledge between the two nations.”
2. verb
to pledge or agree to something, especially in a formal or solemn manner
“The king impledged to protect the people from harm.”