"Sh'ma, Yisra'el! ADONAI Eloheinu, ADONAI echad
[Hear, Isra'el! ADONAI our God, ADONAI is one]
The word used here is echad. Let's look at another verse.
This is why a man is to leave his father and mother and stick with his wife, and they are to be one flesh.
The same word that is used in Deuteronomy is used in Genesis. "Echad" is used most often as a unified one, and sometimes as numeric oneness. The word for "solitary one" is "yachid." That word is never used in Scripture in reference to God. Echad also means multiple objects becoming one, or an assembly as one. Here's a few more verses for you. Note that "hen" "monos" and "bad" also mean unified one.
# "Hear, O Israel! Yahweh is our God, Yahweh is one [echad]!" Deuteronomy 6:4
# "You are the God, You alone [bad], of all the kingdoms of the earth." 2 Kings 19:15
# "You alone [bad] are Yahweh." Nehemiah 9:6
# "You alone [bad], Yahweh, are God." Isaiah 37:20
# "And Yahweh will be king over all the earth; in that day Yahweh will be the only one [echad], and His name the only one[echad]." Zechariah 14:9
# "the two shall become one [hen] flesh" Matthew 19:5
# "you do not seek the glory that is from the one and only [monos] God?" John 5:44
# "I and the Father are one [hen]." John 10:30
# "This is eternal life, that they may know You, the only [monos] true God" John 17:3
# "since indeed God is one [hen]" Romans 3:30
# "to the only [monos] wise God, Amen." Romans 16:27
# "There is neither Jew nor Greek, there is neither slave nor free man, there is neither male nor female; for you are all one [hen] in Christ Jesus. " Galatians 3:28
# "there is no God but one [hen]" 1 Corinthians 8:4
# "yet for us there is but one [hen] God, the Father, from whom are all things and we exist for Him; and one [hen] Lord, Jesus Christ, by whom are all things, and we exist through Him." 1 Corinthians 8:6
# "Now a mediator is not for one party only; whereas God is only one [hen]." Galatians 3:20
# "There is one [hen] body and one [hen] Spirit, one [hen] hope, one [hen] Lord, one [hen] faith, one [hen] baptism, one [hen] God and Father of all who is over all and through all and in all." Ephesians 4:4-6
# "Now to the King eternal, immortal, invisible, the only [monos] God" 1 Timothy 1:17
# "which He will bring about at the proper time—He who is the blessed and only [monos] Sovereign, the King of kings and Lord of lords, who alone [monos] possesses immortality and dwells in unapproachable light, whom no man has seen or can see. To Him be honor and eternal dominion! Amen." 1 Timothy 6:16
# "For there is one [hen] God, and one mediator also between God and men, the man Christ Jesus," 1 Timothy 2:5
# "You believe that God is one [hen]. You do well; the demons also believe, and shudder." James 2:19
# "For certain persons deny our only [monos] Master and Lord, Jesus Christ." Jude 4
# "the only [monos] God our Savior, through Jesus Christ our Lord. Amen." Jude 25
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