The phrase "a key relationship" is correct and usable in written English.
It can be used to describe an important or significant connection between two or more entities, such as individuals, organizations, or concepts.
Example: "In our research, we found that a key relationship exists between employee satisfaction and productivity."
Alternatives: "a crucial connection" or "an essential bond".
"We're betting this will be a key relationship," Chris said.
This proved a key relationship, entailing, oddly, an influence of the student on the teacher.
"To end the role of parent governors who are responsible to and devoted to their schools, is to destroy a key relationship.
Then he brings in Tom Sam Shepardd), the taciturn loner and former marine living on a houseboat across the river who has a key relationship to Mud.
While there is a key relationship (with an acute portrayal of sexual dynamics), the focus is on a different kind of love: the for-better-or-for-worse bond between a grown-up childhood gang in a picture-postcard town devoted to tourists with limited resources for resident teens.
The exhibition will show how an introverted, small tribal kingdom – mythologically founded by the descendants of Heracles – was, said Walker, gradually "drawn into the wider world, developing relationships on the eastern side of the Aegean and forming a key relationship with Athens, which it eventually pushed out of the region".
Aside from the financial support, the announcement marks a second key relationship.
In Who is in your personal boardroom?, she and her co-author, executive coach Amanda Scott propose an alternative approach, which encourages people to focus on a few key relationships instead.
Your goal for the year should be to improve each key relationship by a color; i.e., turning red relationships yellow, and yellow relationships green.
That will place pressure on China to revalue, but without putting the country in a position that weakens international institutions and a key diplomatic relationship.
Maybe you're there to maintain a key network relationship or nurture a direct report.
