swear upon

Verb

formal transitive

(transitive, formal) To take an oath on someone or something.

Japanese Meaning

誰かまたは何かに対して厳かな誓いを立てる / 対象に対して固い誓約をする

I swear upon my father's grave that I will tell the truth.

私は父の墓に誓いを立て、真実を話すと約束します。

Sense（1）

(transitive, formal) To take an oath on someone or something.

to swear upon the Holy Writ to speak the truth

swears upon

（ present singular third-person ）

swearing upon

（ participle present ）

swore upon

（ past ）

sworn upon

（ participle past ）