bifid (en)

(adjective) divided into two equal lobes or parts by a median cleft

codicil (en)

(noun) a legal instrument made to modify an earlier will / (noun) appendix supplement

exordium (en)

(noun) a beginning or introduction especially to a discourse or composition

thymotic (en)

related to the thymos: that area of the soul where feelings of pride, indignation, shame etc are located (in Platonic philosophy)