The phrase "a loyal partner" is correct and usable in written English.
You can use it to describe someone who is faithful and supportive in a relationship, whether romantic or platonic.
Example: "In every challenge we faced, she proved to be a loyal partner, always standing by my side."
Alternatives: "a faithful companion" or "a devoted ally."
Dr. Buscaino was a fine cardiologist, a loyal partner, a devoted husband and father.
We further extend our sympathy to Jim's wife Bonnie, ever a loyal partner in many of his accomplishments.
On Friday he will take Prime Minister Tony Blair of Britain -- a loyal partner in public, a voice of some caution in private -- to Camp David.
As World War II engulfed Asia, he was a loyal partner of the French colonial administrators, who collaborated with Japan and hoped to fend off a nascent Cambodian independence movement.
Entering the conflict in Syria has allowed Putin to combat what he sees as a U.S. policy of regime change, show off his military muscle and reassure allies in the region that Moscow is a loyal partner, von Eggert said.
The former leader – a multimillionaire mining executive who, having been educated in the US, spoke Spanish with a heavy American accent – was a loyal partner in America's drug war in the region.
Don't think that because someone is from a certain zodiac sign they would make a better friend/ a more loyal partner/ a better worker.
If you are married to a Scorpio you will never find a more loyal partner to share your life with.
And besides, Nestlé had been a steady, loyal partner of L'Oréal and the Bettencourts for 40 years.
3) Whether Ukraine becomes a failing state where the center has no control over all of its territory, or it moves decisively toward the West, Kazakhstan will find itself carrying the partnership with Russia alone (Belarus is relatively marginal in the overall picture) and thus at risk of being the primary focus of Moscow's attention as a "second loyal" partner whose defection cannot be tolerated.
His six-part autobiographical series follows a devoted and loyal partner and father named Karl Ove Knausgaard.
