US-P18.092ab ।US-P18.092cd ॥
In plain words
Which of them is primary and which is subordinate is settled only by how they lean on each other. In the same way, which word qualifies and which is qualified has to be worked out by reasoning.
Close to the Sanskrit
By mutual dependence, of those the status of principal and of subordinate is accepted; likewise the relation of qualifier and qualified is indeed to be grasped by reasoning.