Pronunciation: [sˈɪliə] (IPA) 
The word "sillier" is spelled with a double "L" after the letter "I" because it follows the rule of doubling the final consonant when adding a suffix to a one-syllable word that ends in a consonant followed by the letter "I". In IPA phonetic transcription, the word is /ˈsɪliər/. The stress is on the first syllable and the "er" sound at the end is pronounced as a schwa vowel sound followed by the "r" sound.
Sillier is the comparative form of the adjective "silly." Silly is typically defined as behavior, actions, or ideas that are foolish, lacking in sense, or absurd. It refers to something that is amusing, foolishly trivial, or lacking seriousness. When describing a person, silly characterizes someone who is behaving in a dismissive, nonsensical, or irrational manner.
Sillier emphasizes that the behavior or actions being discussed are even more foolish, absurd, or lacking sense in comparison to something else. It suggests a higher level of foolishness or an increased lack of seriousness. It can also imply a greater degree of amusement or triviality associated with the subject at hand.
For example, if someone performs a prank that results in minor consequences, we might say it was silly. However, if they perform a prank that leads to more severe repercussions, we could then describe it as sillier.
Overall, the comparative form "sillier" denotes a heightened level of foolishness, absurdity, lack of sense, or triviality in relation to its base form "silly". It is a term used to describe something or someone that exhibits a greater degree of nonsensical or amusing behavior or ideas.
* The statistics data for these misspellings percentages are collected from over 15,411,110 spell check sessions on www.spellchecker.net from Jan 2010 - Jun 2012.
The word "sillier" is derived from the base word "silly". The etymology of "silly" can be traced back to Old English, where it was originally spelled as "sǣlig". This Old English word had several meanings, including "blessed", "happy", or "innocent", but gradually evolved to denote a lack of good judgment or foolishness. Over time, the word underwent phonetic changes, and the spelling transformed to "silly" in Middle English. The comparative form of "silly" is "sillier", which indicates a greater degree of foolishness or lack of common sense.
