ides 
(īdz)
(īdz)pl.n. (used with a sing. or pl. verb)
The 15th day of March, May, July, or October or the 13th day of the other months in the ancient Roman calendar.
[Middle English, from Old French, from Latin Īdūs, probably of Etruscan origin.]
- bitter aloes
- bitter apple
- bitterbrush
- bittercress
- bitter end
- bitter ender
- bitterly
- bitter melon
- bittern
- bittern
- bitterness
- bitternut hickory
- bitter orange
- bitterroot
- Bitterroot Range
- bittersweet
- bittersweet nightshade
- bittiness
- bitty
- bitumen
- bituminization
- bituminize
- bituminoid
- bituminous
- bituminous coal