Κυρίου (Kuriou) in Matthew 1:20: Noun Genitive Singular Masculine

Noun: the word names a person, authority figure, or title of respect, and here it functions as a substantive form.

Genitive: the form usually marks a relationship to another word, often showing possession, source, association, or characterization in the clause.

Singular: the form is grammatically singular in this occurrence, so it points to one referent or one shared title.

Masculine: the noun is in the masculine grammatical class, which is a formal feature of the word and does not by itself make a theological claim.

ἄγγελος

The genitive Κυρίου most naturally describes the angel as belonging to, sent by, or associated with the Lord. The form signals relation, but the context determines the exact nuance.

It identifies the messenger in relation to the Lord, so the phrase reads as an angel of the Lord or Lord's angel in this scene.

It does not by itself say the angel is the Lord, nor does it force a full doctrinal conclusion from case alone.

High: The genitive noun identifies the angel in Joseph's dream as a messenger related to the Lord.

Genitive singular noun modifying angel. marks the messenger as belonging to, sent by, or associated with the Lord. Attached to the angel-of-the-Lord phrase in Matthew 1:20. Governed by the noun angel in the dream appearance scene. The genitive gives the messenger phrase its authority relation without making the angel identical with the Lord by grammar alone.

Whose messenger appears in the dream? The genitive relates the angel to the Lord, presenting the message as Lord-authorized.

Direct: The form directly supports wording such as "an angel of the Lord" or "the Lord's angel."

The genitive may be heard as possession, source, or association; the dream-message context guides the nuance. The phrase should not be used by itself to settle every question about angelic identity or divine manifestation.

Genitive relation proves the angel is the Lord: The form identifies relation to the Lord; identity claims require more than the case ending. messenger language becomes private advice: The genitive supports Lord-linked authority in the scene, while the spoken message carries the instruction.

The witness reads ἄγγελος Κυρίου in Matthew 1:20, with the genitive form placed directly after ἄγγελος in the dream appearance narrative.

The lemma is κύριος, a word that can mean lord, master, or Lord, and in biblical usage can refer to human authority or to God depending on context.

Here the genitive does not stand alone. It works with ἄγγελος and the surrounding narrative to describe the messenger as belonging to or representing the Lord.

The verse presents a divine message to Joseph through a heavenly messenger, so the genitive helps frame the appearance as coming from the Lord's side of the story.

In the wider biblical setting, the phrase fits speech about God's messengers and God's authoritative intervention, but the verse itself should control the immediate reading.

For teaching or translation, the form supports rendering the phrase naturally as 'angel of the Lord' or 'the Lord's angel,' while keeping the focus on the message sent.

Do not derive from the genitive alone that the phrase exhausts the identity of the Lord, settles all questions of Christology, or changes the lemma into another word.