Word Study
undeceitful |
undeceive |
undeceived |
undecency |
undecennary |
undecennial
| undecent
| undeceptive
| undecide
| undecided
| undecipherable
undecennial
CIDE DICTIONARY
Occurring or observed every eleventh year; belonging to, or continuing, a period of eleven years; undecennary; as, an undecennial festival. [1913 Webster]
For further exploring for "undecennial" in Webster Dictionary Online