Pronunciation: [ɹˈɒkəst] (IPA) 
The word "rockest" is not a commonly used word in English, and is not considered proper grammar. However, it can be seen as a variation of the word "rock" in the present tense, and in the second person singular form. The IPA phonetic transcription for "rockest" would be /ˈrɑkɪst/. It is important to note that using non-standard or incorrect grammar can impact comprehension and clarity of communication.
The word "rockest" is derived from the Old English word "roccian", which means "to move back and forth" or "to shake". Over time, the word evolved in Middle English to "rocken" and then "rokkenn", which means "to sway" or "to cause to move". Eventually, the word underwent further changes and modifications, leading to the modern English word "rock". "Rockest" is the superlative form of the verb "rock", used to describe the action of rocking or moving back and forth in the greatest or most extreme manner.
