The word "didst violence" is an archaic form of the phrase "did violence" and is not commonly used in modern English. The spelling of "didst" represents the second person singular past tense form of the verb "do" and is pronounced as /dɪdst/. The pronunciation of "violence" is /ˈvaɪələns/ and the IPA transcription of the entire phrase is /ˈdɪdst ˈvaɪələns/. This phrase means to commit an act of aggression or physical harm towards someone.
The word "didst" is a contraction of "did" and "st", where "did" is the past tense of the verb "do", and "st" is the second person singular form of the verb ending used in archaic English. So, "didst" is a second person singular past tense form of the verb "do".
The word "violence" comes from the Latin word "violentia", which means "vehemence, impetuosity, or strength". It was derived from the word "violentus", meaning "vehement, impetuous, or forcible". Over time, the term "violence" came to refer to the use of physical force or power to cause harm or damage.