1. (v. t.) To divide the parts of (anything) into more parts; to part into smaller divisions; to divide again, as what has already been divided.

2. (v. i.) To be, or to become, subdivided.

alphabetize analyze anatomize apportion arrange assay assort bifurcate bisect branch break down break up by two catalog categorize class classify cleave codify contradistinguish cut in two cut up demarcate demark dichotomize differentiate digest dimidiate discriminate dissect distinguish district divide divide up divvy divvy up draw the line file fission fork grade group halve in half index list mark the interface order parcel parcel out partition pick out pigeonhole place portion ramify range rank rate reduce reduce to elements resolve screen screen out section segment segregate select separate set a limit set apart set off sever severalize sieve sieve out sift sift out sort sort out split split hairs split in two split up subtilize tabulate transect type winnow zone