assizeyoudaoicibaDictYouDict[assize 词源字典]
assize: [13] Like assess, assize comes ultimately from Latin assidēre, which meant literally ‘sit beside someone’ (it was a compound verb formed from the prefix ad- ‘near’ and sedēre ‘sit’, related to English sit). In Old French this became asseeir (modern French has asseoir), of which the past participle was assis.

The feminine form of this, assise, came to be used as a noun ranging in meaning from the very general ‘act of sitting’ or ‘seat’ to the more specific legal senses ‘sitting in judgement’ and ‘session of a court’ (English session comes ultimately from Latin sedēre too). It was the legal usages which passed into English.

=> session, sit, size[assize etymology, assize origin, 英语词源]
assize (n.)youdaoicibaDictYouDict
"session of a law court," c. 1300 (attested from mid-12c. in Anglo-Latin), from Old French assise "session, sitting of a court" (12c.), properly fem. past participle of asseoir "to cause to sit," from Latin assidere "to sit beside" (see assess). Originally "all legal proceedings of the nature of inquests or recognitions;" hence sessions held periodically in each county of England to administer civil and criminal justice.