Dedication: 3/15/05

scyphus: see skufoV.
se: see sui
se(d): away, apart, aside

secede, seduce, sedition, separate, etc.

sebum: tallow

sebaceous, sebiferous, sebific, sebiparous, sebolith, seborrhea, sebotrophic, sebum, suet

seco, sectum: cut; securis: axe

bisect, bisection, bisectional, bisector, cosecant, coset, cross-section, cutisector, desegmented, disinsectize, dissect, dissection, dissective, dissector, duosecant, exsect, exsectile, exsection, insect, insectan, insectarium, insecticidal, insecticide, insecticolous, insectiferous, insectiform, insectifuge, insectile, insectival, insectivore, insectivorous, insectology, intersect, intersection, intersectional, intersegmental, intrasegmental, longisection, macrosegment, microdissect, microsegment, midsection, multisegmented, nonsectarian, null set, plurisegmental, prosector, quadrisect, quartersection, quinquesect, ramisection, ramisectomy, secant, secodont, sectile, section, sectional, sectionalism, sectionalist, sectionalization, sectionalize, sectionally, sectionary, sectionist, sectionize, sector, sectoral, sectorial, sectorization, securicornate, securiferous, securiflorous, securiform, segment, segmentable, segmental, segmentalization, segmentalize, segmentally, segmentary, segmentate, segmentation, segmentative, segmenter, set (math), sickle, sickle-cell, solution set, subsection, subsectional, subset, suprasegmental, ternatisect, transect, transection, trisect, trisection, trisector, unsegmented, venesection, venesector, vivisect, vivisection, vivsectional, vivisector, wax insect

AHD derives sickle from seco via an unattested Latin word.

Sect is from sequor.