The word "MAINSWORN" is spelled as /ˈmeɪnswɔːrn/ in IPA phonetic transcription. This word is a combination of two words, "main" and "sworn". The word "main" means principal, chief or primary. The word "sworn" means took an oath or an obligation. The combination of these words becomes "MAINSWORN" which means someone who has taken the principal oath or the main oath. The word has its roots in the Middle English period and is rarely used in contemporary language.