sedentary Look up sedentary at Dictionary.com
1598, "remaining in one place," from M.Fr. sedentaire, from L. sedentarius "sitting, remaining in one place," from sedentem (nom. sedens), prp. of sedere "to sit," from PIE base *sed- "to sit" (cf. Skt. a-sadat "sat down," sidati "sits;" O.Pers. hadis "abode;" Gk. ezesthai "to sit," hedra "seat, chair, face of a geometric solid;" O.Ir. suide "seat, sitting;" Welsh sedd "seat," eistedd "sitting;" O.C.S. sezda, sedeti "to sit;" Lith. sedmi "to sit;" Rus. sad "garden," Lith. soditi "to plant;" Goth. sitan, O.E. sittan "to sit;" see sit). Of persons, meaning "not in the habit of exercise" is recorded from 1662.