Robert Letham writes in
The Westminster Assembly (pp. 225-226)
In Protestant scholasticism, long entrenched by the time of Westminster, condescensio was used for God's accommodation of himself to human ways of knowing in order to reveal himself. This was closely related to gratia Dei (the grace of God), the goodness and undeserved favor of God toward man, and to grattia communis (common grace), his nonsaving, universal grace, by which, in his goodness, he lavishes favor on all creation in the blessings of physical sustenance and moral influence for the good [cites Muller's Dictionary]. These are the clearest senses of the terms for the Assembly, for they saw grace as fully compatible with law, not offsetting or limiting it, as in the late medieval notions of congruent and condign grace [sic?].
Did he mean 'merit' in that last bit?