Relating to or consisting of episodes; another variant form emphasizing the episodic character of something.
From episodic + -al (double suffix: -ic plus -al). This form emerged in older English texts as writers stacked suffixes for emphasis or stylistic preference.
Medieval and Renaissance writers loved stacking suffixes ('episodical' vs. 'episodic')—this redundancy was considered more formal and impressive, like how we still say 'very unique' even though 'unique' already means one-of-a-kind!
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