1. Representing the furthest possible extent of analysis or division into parts
   - unanalyzable [N. Amer], undecomposable

See also: simple

• bitter dock
• bitter end
• bitter floom
• bitter hickory
• bitter lemon
• bitter orange
• bitter orange tree
• bitter pea
• bitter pecan
• bitter pignut
• bitter principle
• bitter salts
• bitter spar
• bitter-bark
• bittercress
• bitterish
• bitterly
• bittern
• bitterness
• bitternut
• bitternut hickory
• bitterroot
• bitters
• bittersweet
• bittersweet chocolate