You mean decline, not declension (a grammatical term).
Officer, I am not sure what state you are from (could be the state of Missouri or hunger...) but please let me explain: where I am from one of the meanings of declension as a noun can be "the process of changing to an inferior state," likewise "a falling off or away : deterioration," among other synonyms.
Therefore that sign back there warning of a steep decline could say steep declension, which/witch is where I see society - and even much of the church - heading. And I was so preoccupied in my mind about the latter that all I could immediately think of was how fitting, meet, suitable, appropriate (but not as a verb) that sign was to describe this downward spiritual and moral slope, falling off or away, deterioration, etc. and so i failed to slow down. And so here I find myself (not that I was lost) pulled (not that you actually grabbed me) over.
What's that? Just a warning? Oh thank you so much.
I hope are laughing as I am, for the scope and breadth and depth of human language has no equal that we know of. To the glory of God, and to be used rightly.