Spelling: adding(-est) – English editing.

 If the word ends in a consonant, add -est (quick becomes quickest).
 Words of one syllable with a short vowel sound and ending with a single consonant, double the consonant and add -est(sad becomes saddest).
 With words of one syllable ending in ‘l’, you normally do not double the ‘l’, but cruel becomes cruellest.
 If it ends in ‘e’, add -st(late become latest).
 If it ends in ‘y’, change the ‘y’ to an add -est (happy becomes happiest).
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