Shirabe
忠誠 を 誓う

誓うちかう

Common Godan Transitive
English jmdict
1
Godan verb with 'u' endingtransitive verb to swear;to vow;to take an oath;to pledge
君は聖書に手をのせて誓うべきだ。
You should swear on the Bible.
Other forms 盟う 【ちかう】