Present participle of catechise; the ongoing process of instructing someone in religious doctrine through questions and answers, or questioning them closely.
From 'catechise' + '-ing' suffix (present participle). This British spelling form shows the continuous or ongoing action of the teaching/questioning process.
Catechising is happening all the time in different forms—whenever a teacher asks probing questions to check understanding, or when parents ask kids about their day, it's a form of catechising.
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