'Merely' in the Bible

Therefore the word of the Lord to them will be [merely monotonous repetitions]:“Precept upon precept, precept upon precept,Rule upon rule, rule upon rule,Here a little, there a little.”That they may go and stumble backward, and be broken, ensnared, and taken captive.

“As often as it passes through, it will seize you;For morning after morning it will pass through, by day and by night,And it will be sheer terror to understand what it means.”

“Is a fast such as this what I have chosen, a day for a man to humble himself [with sorrow in his soul]?Is it only to bow down his head like a reedAnd to make sackcloth and ashes as a bed [pretending to have a repentant heart]?Do you call this a fast and a day pleasing to the Lord?