sex·cen·te·nar·y 
(sĕk-sĕntə-nĕr′ē, sĕk′sĕn-tĕnə-rē)
(sĕk-sĕntə-nĕr′ē, sĕk′sĕn-tĕnə-rē)adj.
Relating to 600 or to a 600-year period.
n. pl. sex·cen·te·nar·ies
A 600th anniversary or its commemoration.
[From Latin sexcentēnī, six hundred each : sex, six; see SEX- + centēnī, a hundred each (from centum, hundred; see dek in the Appendix of Indo-European roots).]
- Indo-European root: skel-
- Indo-European root: sker-
- Indo-European root: sker-
- Indo-European root: sker-
- Indo-European root: (s)keu-
- Indo-European root: skeud-
- Indo-European root: skrībh-
- Indo-European root: sleiə-
- Indo-European root: sleubh-
- Indo-European root: slēb-
- Indo-European root: slēg-
- Indo-European root: smei-
- Indo-European root: (s)mer-
- Indo-European root: (s)mer-
- Indo-European root: sneigwh-
- Indo-European root: (s)neəu-
- Indo-European root: snā-
- Indo-European root: (s)nāu-
- Indo-European root: (s)nē-
- Indo-European root: so-
- Indo-European root: sol-
- Indo-European root: spek-
- Indo-European root: (s)pen-
- Indo-European root: spend-
- Indo-European root: sper-