What type of spelling error is represented by the word equilise?

The word "equilise" represents a morphological spelling error, as it suggests a misunderstanding of the morphemes that make up the word "equal" and its variations. Morphological errors occur when a learner is unable to correctly form words based on their structural components or meanings. In this case, the incorrect spelling may arise from attempts to apply a morphological pattern or rule that does not fit the standard form of the word in English.

Understanding morphology helps in recognizing that words are built from smaller units of meaning, and when these units are misapplied or misunderstood, it leads to spelling errors like "equilise." This gives insight into the learner's processing of word formation and understanding of word meanings, which is crucial for improving spelling and overall literacy skills.