descent

n.下降，降下；斜坡；血统，家世

derm(a)-, dermatitis, dermatologist, dermatology, dermis, derogate, derogatory, derrick, derring-do, derv, dervish, DES, desalinate, desalination, desalinization, descale, descant, descend, descendant, descendent, describe, describing, description, descriptive, descriptively, descriptiveness, descry, desecrate, desecration, desegregate, desegregation, deselect, deselection, desensitization, desensitisation, desensitize, desensitise, desert, desert island, deserted, deserter, desertion,