A solemn promise, often used in formal, religious, or personal commitment contexts.
He swore an oath to God.
He kept the vow he made at his wedding for his entire life.
Exchange wedding vows.
She ended up breaking the vow she had made to herself.
The two of them exchanged eternal vows.
They renewed their vow to each other before God.
宣誓 emphasizes the ceremonial act of publicly declaring an oath (e.g. in court or at the Olympics), while 誓い is the vow itself as a noun.
誓い is a general vow or promise, whereas 固め refers to a ritual pledge sealed through an act like exchanging a ceremonial cup.
誓い emphasizes a binding promise or oath one makes to oneself or others, whereas 願 is a wish or prayer directed outward, often to a deity.
誓い (a vow) and 近い (near, close) are pronounced identically but are completely unrelated words with different kanji and meanings.
Standard kanji spelling for oath or vow.
Derived from the verb 誓う (ちかう, to swear), with the nominalizing suffix い.